Males

对包围圈日军歼灭战的第一轮进攻  \% q! j6 ]* o( |- L$ t

4 t: y* T5 o9 O$ c8 c' s第一天
* Z* x+ [% ~& A7 _Ground combat at 43,31' H% {% E+ A* S& O. o/ d( X

' e9 F! P0 F" G7 P; dAllied Shock attack
4 S) |1 I! k6 k& n/ e3 s0 Y% N+ ^& n4 @6 s0 p
Attacking force 124697 troops, 947 guns, 73 vehicles, Assault Value = 3721
5 m) k& {# M' v! ~1 x$ D, J% @' @( W2 e; L' L
Defending force 65728 troops, 744 guns, 9 vehicles, Assault Value = 13095 n$ c- O$ I* W4 y, F% q

/ V% a7 l  }5 gAllied max assault: 7164 - adjusted assault: 4011
+ z; i; r, F+ c; b0 I
6 k2 X, E% [5 x0 u# ?8 y2 p7 n1 MJapanese max defense: 1346 - adjusted defense: 855
$ A5 u& k( ^. {- x: k; x# Q
$ t. [6 b# ?+ MAllied assault odds: 4 to 1
6 k6 z$ A/ V2 ]0 D5 S2 ^( ?  b- o% |1 l& V+ n/ ?" J9 K) V) R
Japanese ground losses:
- z; Q0 Y# M+ v* O477 casualties reported
% y; M+ ?% u) g8 M4 N: IGuns lost 133 d, r* _9 Q( X/ i6 C" `
. A  _# L6 D, h( Q3 Y& F
Allied ground losses:) c, h3 m- k/ r4 F9 s! L% J
2700 casualties reported
: D7 \$ Q5 r& e* p" m7 L! B" M6 ^6 _8 _0 {Guns lost 931 [" ?2 ]+ l: b# W
Vehicles lost 22 f7 I) `( s0 t4 m# I

$ H$ O" H( i/ \9 a/ n! o第二天0 r7 `( H) D6 [: }2 ^6 U
Ground combat at 43,31
) Y( x" l0 n1 }, W0 c
3 H2 n0 i1 s  v: E9 uAllied Deliberate attack
5 r# B0 c; X, w/ s2 [& j- K. b/ k3 B0 j2 K
Attacking force 120723 troops, 822 guns, 71 vehicles, Assault Value = 3403# a5 x* a: r' d5 H6 h

& b, k  e% J1 O$ ]/ GDefending force 64593 troops, 726 guns, 9 vehicles, Assault Value = 1301: R2 t( R7 s, j. g; n, a1 i  D7 s
, k6 v2 l' h- \: W; w% |5 C) E
Allied max assault: 3071 - adjusted assault: 1149 ; w" T7 _0 e$ ]- h6 {: O

" w  b+ |, U2 qJapanese max defense: 1333 - adjusted defense: 549
3 W3 ^; T5 {- W
4 U& @9 M- d' @5 s' S- O- SAllied assault odds: 2 to 1 ' R  J4 r8 W! w2 N: y

5 d# Y% F& B, h# N; x! n/ B6 s: w$ X. h
Japanese ground losses:/ w% G: m. J+ H+ g- k
449 casualties reported8 @. h9 E* X* ^
Guns lost 148 n7 b5 d7 S) U2 W

6 Q9 ?( m3 @5 r6 u; h% wAllied ground losses:
" g( ~5 d  {7 b3 X8 T# p' @1407 casualties reported  U1 ^" R. ?2 [: |' K0 _
Guns lost 461 g, J6 L8 a9 @  ^* l

) P/ F. o- M# a" n6 m第三天
) a! O. B* F5 o$ j0 I% uGround combat at 43,31
: J, V0 Q% |$ c/ L( b; @9 L: {5 B
' u1 C0 Z+ @# ?  p0 j! JAllied Deliberate attack  Q, |/ P5 a0 U& N8 A" H
0 s' X, f5 \/ Q
Attacking force 118451 troops, 751 guns, 70 vehicles, Assault Value = 3238$ ]' H/ ^1 x( E6 {, R( ^
) W3 |2 H% r8 S
Defending force 62973 troops, 703 guns, 9 vehicles, Assault Value = 1294# @  I& `# d7 e, P0 q) Z- B6 e6 v6 K

  W, i( I! @" _Allied max assault: 2870 - adjusted assault: 779 . P& x! c% o, x, C% W9 Z2 k
7 i& J9 |- [! A. H* _7 n+ `2 u
Japanese max defense: 1305 - adjusted defense: 488 0 z2 r1 Y8 k8 Q& F/ _6 P
3 k/ V. q. Q) q4 R" Q; d
Allied assault odds: 1 to 1
' a2 u* c. U& H+ X* [# P6 \" Z5 b$ G+ e4 f+ k- A
Japanese ground losses:( r$ B4 j0 o2 G1 c5 ]
682 casualties reported& u* F1 a# ~6 e# D2 F$ S
Guns lost 309 A  D) U/ S8 H  F8 q8 u/ `
Vehicles lost 1
9 m% r1 I3 O. ~  @% j' k
  Z/ R6 A! j; }, TAllied ground losses:
( T! ]+ L7 o/ D$ \# @# c. J' U8 i1585 casualties reported8 K/ g, l, z( w/ F6 d
Guns lost 60
& X% Z1 e: f# i5 zVehicles lost 2
' `% @8 d* ?1 P* h0 x$ A, f4 P
5 {8 B9 J( C3 z第四天
- e+ f* W' F$ m) _0 _+ G  xGround combat at 43,311 Q+ Z6 I0 n# r
: U. u! d) t5 O+ z7 L
Allied Shock attack& E9 U( W" a- m) m  ?# [
2 X4 d& o: P# @. V
Attacking force 116057 troops, 670 guns, 68 vehicles, Assault Value = 3050
; @2 ?' d& x% k6 f4 A% z! x8 B) d1 g9 R
Defending force 61583 troops, 664 guns, 8 vehicles, Assault Value = 1273
0 [' ]# a2 T+ V) j" o5 K- S3 y3 V- j3 k
Allied max assault: 5430 - adjusted assault: 1028
, Z4 I! m1 u' w9 Q% `& l9 R, q- O! M- \  x7 v+ A  ?
Japanese max defense: 1235 - adjusted defense: 644 3 p( x1 |, M5 V2 W

$ M5 x4 s( R7 I2 P% F, rAllied assault odds: 1 to 1
$ E  ^! a( @7 l8 j
, Y9 L0 j: L9 `% ]
( l& c( j9 A1 l1 j4 A  WJapanese ground losses:# i: x0 m  T/ Z0 C: W* C
691 casualties reported
8 ~. E2 t+ A6 M  @1 p' ~- K) ~0 iGuns lost 8+ ]4 `  ~( V' q& @7 o) s0 i  n
0 t) y; g5 m0 Z
Allied ground losses:5 F" I2 C" A0 q. _
2252 casualties reported
* }! r7 a4 }0 t0 z0 mGuns lost 67" m! `7 J. H+ d# W# \$ X
Vehicles lost 4, M+ k# l7 ^( A# W" h

3 I; H+ P! v# h4 l! \0 l, V0 S" b" i  J
日军减员4000余人，国军减员10000余人，但国军是可以恢复的
9 G) k3 O( R" N; u% y6 C
$ B! Z+ W: e  a# Y. E6 ?2 p! Q
* K7 B  I2 H' x; K随后两天国军进行休整
( q& O/ T, s. o/ S4 w5 d8 f3 m. J
9 A! D1 C) U9 _3 S: b, `9 ^
/ i  H4 K* P: H$ [2 g7 j' J第五次进攻
1 C% m8 \+ X0 F4 D+ f0 A3 q' r* |$ d; c
Ground combat at 43,31& G- |$ I2 P, F1 V
5 u# ]' B: F1 _$ ?
Allied Shock attack
4 r2 F8 T# p$ W* L7 `
& E, Z& G& Z2 X8 S8 TAttacking force 112498 troops, 607 guns, 69 vehicles, Assault Value = 27100 q" u, H0 `# i! A  G; m. @5 f

) G1 }6 \" w( q& V# p0 `1 EDefending force 60376 troops, 651 guns, 7 vehicles, Assault Value = 1263
* O# h* j/ u! \3 o( H9 Q
$ A9 j* ]6 d) a( ^$ o+ X6 i7 ^6 G( U; bAllied max assault: 5168 - adjusted assault: 2095
: f- ~  f5 n7 o# E* |0 S, q2 @$ C, i8 _8 g; j( s% e
Japanese max defense: 1275 - adjusted defense: 469
7 g- D, V. O4 u2 C6 c/ a4 @9 Z9 q
* {8 p3 H# V. [( a1 yAllied assault odds: 4 to 1 " L$ K4 h) R. ?6 C9 _
* D- d/ |; u6 f( m4 V# X6 ?: k

% k/ L; {& ?/ r$ ?. t2 B% Q. yJapanese ground losses:+ R" ]1 {! }( u) d6 ?
1123 casualties reported
4 n8 n1 F& R1 @Guns lost 8
9 C/ v' Q) b* ]$ K+ K
: L2 m) d+ U$ r  p' LAllied ground losses:
6 X5 v+ e1 d9 b& |+ J2701 casualties reported
' [: E* O/ g. M8 O5 w. ]( k8 `; ~; tGuns lost 67) j, r5 @6 _: g+ D. m1 x, V* ~3 E4 l
Vehicles lost 8
! q# |, E7 @& W* S$ ^4 s % J$ }. P" J9 n% @
每次进攻 日军减员在1000-2000人之间，后期应该越推越快，按照打一天休息一天算，这批日军至少要3个月以上才能歼灭 9 m) E) C, C3 n# z2 a* R

% |. c/ K# |9 [$ L[ 本帖最后由 Males 于 2008-7-1 23:52 编辑 ]

dilliulian

没有个半年根本啃不动的,你长沙早就失守啦

dilliulian

AFTER ACTION REPORTS FOR 03/22/42- q+ I$ b% }% _! b1 @
--------------------------------------------------------------------------------1 |; b( J. U% I5 {3 `( {
Naval bombardment of Karachi, at 21,30 f- E1 }! C( C% p, j
( c2 V) I- E. u, X% \
Japanese Ships
4 ]% _5 c1 O; u' N: L# C4 t  qCA Mikuma
2 e0 F- Y, U  G7 B) L3 D8 E! Y  w; pCA Mogami( H. @! u  t4 G# s0 U7 z
CA Nachi
$ h, j9 c/ S/ [' p$ z' Y% }; [CA Haguro
. h- C' S0 P0 F2 _+ Q# D; l# S8 k! UCA Myoko& y" X) o; H, D0 U5 h+ c% {
CA Maya, ]- @$ Y7 l4 o$ v
CA Atago4 n3 o( T6 B2 C  B5 d& Y& ~
BB Hyuga
) @! n6 v( M- c) F0 p' \8 GBB Mutsu& z, Y7 D0 }& |* b; [
BB Nagato9 b* S: R) ?! n6 B# p
BB Kirishima4 J+ y2 Z4 i$ O3 Z1 L  A2 Y
BB Hiei" a& g, A6 I/ d$ k) W5 L- M
5 v8 L1 J4 i' e/ o! ]

+ h% {! o# j- i4 x$ T5 ~  KAllied ground losses:, g5 \, k9 w1 w, ~2 \2 Z5 v
657 casualties reported
8 h! [& s) S% s2 AGuns lost 2
+ q; x( h, Z9 J, t( BVehicles lost 3
3 c, f# z) _4 _3 J- A5 ?5 ~( L) }8 Z# ^
4 d# o  @$ G# }9 CAirbase hits 3- p4 s1 Q8 d  n; q
Airbase supply hits 46 p+ I8 b9 l& `6 U+ X
Runway hits 52
# {/ d" K4 O6 L" G% N# y* ePort hits 7
6 G1 V6 t1 k! x3 b/ l( sPort fuel hits 6
: f: q3 U3 Z( o! y* T9 K6 u. w, {6 pPort supply hits 54 r! l- J- X3 R# p8 p

* Z/ N$ ~' I' i- x* N3 \--------------------------------------------------------------------------------% m* a) z5 e& R# n5 n0 I
Naval bombardment of Karachi, at 21,3* r8 `1 e# b! M: Z7 j" D9 \$ T+ d
1 a. m0 H: O2 b8 k9 u- U
Japanese Ships; l4 Y# W  s- k' ?7 n  U. B
CA Chokai* Y& u, Y9 e% e
CA Takao, k+ \( Y0 L, B0 ~  V0 r8 l
BB Yamashiro2 J$ V+ P2 D! O' y7 ^9 @
BB Fuso  i' x$ s6 E8 A6 C
BB Haruna1 @+ I7 `( }, u$ r1 R! W
BB Kongo# @4 M1 _& g2 f# M* }2 D- q

8 |7 j; N+ x/ \( n3 r$ \! } & ^1 z' g, d4 s5 c' b
Allied ground losses:
" X# O, N+ c) f" S; f123 casualties reported
. D& c2 l) V1 O2 Z. U0 h* N2 g- L) _( p
" K. I& ^+ E& ]% s( [7 \/ cAirbase hits 1" Z$ h9 M' G; [
Runway hits 39
2 ]  y; [- o4 d" h( xPort hits 5
8 g, ]6 V% z+ TPort supply hits 8- n; @$ X! r6 f$ e( I' e, k
--------------------------------------------------------------------------------7 I7 R, t7 B! ?/ Y4 `) e6 \& K3 Q
Ground combat at Karachi2 H; B  N& X. v, _9 u% x2 ]

3 P% I8 v8 u+ {5 xJapanese Shock attack
; X/ h+ x3 D) e
, w& r9 a8 |- H4 \# Q% cAttacking force 173921 troops, 1762 guns, 24 vehicles, Assault Value = 3011' U8 n+ H' h% ?

1 ^5 b7 H0 H: Q0 L  H3 QDefending force 26146 troops, 196 guns, 0 vehicles, Assault Value = 600) G6 _  j5 z, S* o
. _4 |3 ^% c8 \
Japanese engineers reduce fortifications to 1
; Q3 l1 d) |7 O* e: f: Y" E% L : f' w5 V8 `) f4 j
Japanese max assault: 5792 - adjusted assault: 4334
# C4 i6 T( e; C1 \1 |
8 L( l3 X" y5 L5 n" s. e. P! |3 xAllied max defense: 345 - adjusted defense: 705
+ `1 u# J% f0 A* n: d' F
) M7 D4 u9 ~- }! [. lJapanese assault odds: 6 to 1 (fort level 1)
- h) f6 p  _6 Y1 Q( G
& k1 [; O, a  }- S" c4 e/ ]9 B5 P3 WJapanese forces CAPTURE Karachi base !!!/ [0 q( E. b# T, c  n
$ |. R2 U. [/ r% Z1 }* n) g# N# C: t$ d
2 ^( R- }; X; a' }2 A0 [* q

. L' i, e* w" N7 NAllied aircraft3 P' ~5 A6 b! V1 _
no flights4 A9 ~8 [; w" w7 T% `- p
+ @+ O! U& Q7 A

9 u. L; {/ o; a0 qAllied aircraft losses* O  L. `9 h2 y  w
Catalina I: 1 destroyed
5 H8 A4 n8 k* h* hHurricane II: 1 destroyed# }9 K6 f/ e! }( Y$ w) N
6 j% O3 o2 Y& f) z/ F3 B
Japanese ground losses:
  V; ?: z( a& L; e" w2074 casualties reported. ?) z0 j* Z8 |  K( I
Guns lost 32
& M2 u9 ~2 v9 K4 t  g5 `9 D( SVehicles lost 1' a2 A- d& k7 p; W) x& z
, z- a  i# |+ g. P3 b; l
Allied ground losses:
/ N1 V& S  ?: [6 x9 L9 `- ^/ K( h38828 casualties reported
- @2 F5 a/ J4 c% D8 rGuns lost 298
+ v- X2 X8 K$ i( i; D/ E$ W7 A# b/ u5 E9 R, ?7 c
英第2,第18师也被从战斗序列中删除了& w6 j' V& z2 x% N3 ]2 ?
帝国位于德里的多只坦克连队还是抵挡不住英军坦克旅的进攻被迫撤退8 {* f! d( r" `( U6 N. L8 v
--------------------------------------------------------------------------------& \3 W- C$ `0 G. ]$ N; R  ?
Ground combat at Delhi
. N0 H; z1 s! C8 d* s  d
1 P0 }5 H8 r! A2 Z4 vAllied Shock attack
& f6 m4 _  I( b 6 z$ B, n) E6 N/ y
Attacking force 52548 troops, 600 guns, 713 vehicles, Assault Value = 727
& I+ H8 y+ J- c' J& h4 p ) g6 s. m' R; m2 o7 i$ N. \4 @
Defending force 7584 troops, 63 guns, 377 vehicles, Assault Value = 236
5 @- g/ k6 C# m
; @  o$ }$ a! \Allied max assault: 1462 - adjusted assault: 1452 8 I; h1 l0 q# R6 r% ]7 f: e
; }1 \4 u2 q& C& q. Q
Japanese max defense: 236 - adjusted defense: 389
# |9 v0 }* h  b0 V* Y
6 E  S4 q# ^6 k: i/ ?4 JAllied assault odds: 3 to 1
$ u4 l- Y( A# ?4 s& Q0 Q" ? # T; n3 A+ `8 `5 x0 t, }, L
  M! G* {6 p8 c
Japanese ground losses:
# }  O& _$ D6 G* x, M7 j697 casualties reported
) @" `* Y  }* e( b. R' {6 x- DGuns lost 144 T* _1 ]* u) n; f/ l+ G+ S
Vehicles lost 31
6 |6 D; f7 J1 n8 Y" W7 B& C ! u; E/ y; k; v2 }
Allied ground losses:9 u% M9 D4 g# `& x$ {& Y
1100 casualties reported
* R. i6 ]* E, @/ q% K- v. tGuns lost 47
& F8 W2 O! N  S4 M/ O" [% ~# q- |3 a6 GVehicles lost 6
9 [: p% y/ L4 f4 J: R8 H
# v; Q, O! X) v) T 5 z2 @" @+ d4 i6 v
Defeated Japanese Units Retreating!# i6 T2 S* V; G; k/ I' ?' l8 h! E

2 T+ S9 w& w! ]9 d* ]; L8 F在长沙的帝国炮兵部队展现出惊人的杀伤力,每天都击杀国军近千人,比被包围的日军先头部队的伤亡还厉害2 G  U9 C# q! b$ \2 n$ b# p$ D
--------------------------------------------------------------------------------: ]2 ?: a! w: r$ @, O
Ground combat at Changsha; s9 @6 x3 x8 c, a
) P/ U+ x" S6 l1 X. N
Japanese Bombardment attack5 q1 e, A+ s, u7 z: @

1 x- R' k, ?- x  ~Attacking force 65498 troops, 909 guns, 7 vehicles, Assault Value = 2620  ?; x: u. {0 g9 P) u* \! `
0 ~9 F6 H9 [9 P: U8 D( c  Q
Defending force 76972 troops, 458 guns, 0 vehicles, Assault Value = 1866
+ C( o$ {2 G; i5 ^ 9 U: m1 V$ C  D9 z3 G9 g+ i# C' U
& D# q% t4 ~5 y9 p3 v7 Y

+ F0 R$ I5 x* f1 g/ Y, C$ VAllied ground losses:$ t/ f8 L' C" @9 O% E8 C
741 casualties reported2 X  i& ]3 l& k0 T  N- _
Guns lost 5

dilliulian

之后南方军的后续部队将投入对华支援做战,现在长沙的守军明显力量不足,帝国将尽快攻克,之后再北上救援被围之部队

matie1977

从印度跑到中国，远了点吧。不如就近找关东军帮忙了

kevin_hx

卡拉奇都下了

Males

有空军和海军支援，早晚是要下的......

dilliulian

--------------------------------------------------------------------------------
" j) i1 \& r& u$ F) R# YGround combat at Diamond Harbor* n' F: U4 m$ n6 K+ m1 V
$ B0 V( @4 v4 t6 o9 ~
Japanese Shock attack
* |0 M, d, l! H # ?. W8 F' |' F, K6 g4 ~+ I
Attacking force 2413 troops, 26 guns, 0 vehicles, Assault Value = 686 x3 V5 w/ j7 P

- m- H1 z' g2 u' e! pDefending force 2330 troops, 38 guns, 4 vehicles, Assault Value = 1
- ^/ u" m3 r2 M2 X& k8 h ) D$ i9 S4 |- e" |' J  N2 ~( I  F
Japanese max assault: 114 - adjusted assault: 69
# t" Q8 a" Z) W2 I0 O
5 e8 H6 s7 r  U# C  }( ?7 q! IAllied max defense: 1 - adjusted defense: 12 # m! N5 X* [8 J* @% T, F

  D, T! o1 G5 g9 a9 G+ q; JAFTER ACTION REPORTS FOR 03/28/42) x1 z" ?1 a" s2 l0 E0 t3 q9 q
Japanese assault odds: 5 to 1 (fort level 2) 4 }7 T9 {* Y. @9 }+ {
9 j1 Z$ b) Z, M( R, Y
Japanese forces CAPTURE Diamond Harbor base !!!
9 ]5 ]* z0 w6 w4 A2 Y; U" _0 c0 `
7 j" ~. b/ v$ o9 O' @
( y9 t+ e. A/ X# m! QJapanese ground losses:+ F. E. n1 I6 G9 F7 J$ U. N5 F
171 casualties reported( e; y/ o6 s6 n! Z$ P* `7 [
Guns lost 53 f6 y% V! d* N9 f1 P7 C! D

+ a  F3 Q) a8 T% i' o* T# xAllied ground losses:
5 y9 K2 o! t* Q/ o7 y  `: y; |1915 casualties reported
. L% q- N( I5 O) Q% `3 \9 ^Guns lost 174 J* ~7 d6 W9 Q$ t# M
Vehicles lost 1
: u$ f; G# c2 [9 Z6 ~
( \# \5 I, }' H; J+ R: O) S帝国的炮兵还是很生猛的啊,每天的炮击都有600以上的伤害* T# b- \8 Q' b3 q6 S
( S3 ~0 I2 `9 B1 b7 r9 n
--------------------------------------------------------------------------------
/ c# i) y6 a( V" p. iGround combat at Balikpapan
$ v! e$ @! Y; Y% A4 {# ?/ F9 \ & P+ [- m, Q9 u0 G% M0 I; d3 e4 H
Japanese Shock attack
" K8 @; L& c  Z; K$ R2 w+ I * [5 ?" _2 i* }' O0 l
Attacking force 31885 troops, 238 guns, 8 vehicles, Assault Value = 545
5 v7 h2 u$ `# l9 ~) F0 N * |1 i4 w" Y5 |; |/ `9 U
Defending force 9720 troops, 69 guns, 12 vehicles, Assault Value = 87/ f7 f7 J$ ]& {' q
8 P  b+ l3 z( \. g
Japanese max assault: 1036 - adjusted assault: 821 " }) q( R4 i4 r: T# P. ^% G

. ?" D: f) k% `) [7 Q9 F9 kAllied max defense: 73 - adjusted defense: 73
" D3 F( @5 |2 I& v$ \* I4 s" `# r
1 T" u0 H: I" C3 S" J" TJapanese assault odds: 11 to 1 (fort level 2)
* {6 Q' S' H6 {3 |( t# O; J
4 {2 `5 d) l2 P  w) C4 HJapanese forces CAPTURE Balikpapan base !!!" v" c! G0 m& t, f1 t  ]( X3 }

- |3 N2 x( f7 O/ `
& l' g) x/ @% x: d2 K8 IJapanese ground losses:3 l; r& M" d" b( `2 X% S! ]+ Y, @
807 casualties reported
* F- Y2 I, w5 q5 p" i% `) {Guns lost 15$ Q2 ?) ?" [( M4 \
Vehicles lost 1
& ^2 X# ?- J7 b% X: G 7 l, p* @2 m9 E% z* ?0 H9 D
Allied ground losses:
# x! j( a+ r2 o2 e* X& H+ j" W! x9 U451 casualties reported
: |1 M- C$ i5 x" g+ n6 Y/ SGuns lost 8
& Z7 }8 J  a; h" U
' q' [1 k4 y1 Z
# Q) G! W7 O3 }+ eDefeated Allied Units Retreating!

dilliulian

经过连续作战,帝国的中国派遣军终于打通了大陆交通线

dilliulian

将近9万多国军将士投降,多个番号又一次的取消

dilliulian

战斗部队番号

dilliulian

还有两个战区司令部

dilliulian

在长沙被我派遣军包围的半个月中,帝国的空军精英在长沙上空经过的C-47有将近百架,估计米军的库存也没有了

dilliulian

在印度次大陆上,南方军从LUCKNOW ,DAIMOND两头并进,孟加拉指日可下

chars

盟军统帅舍本逐末，这下亚洲大陆全线崩盘，还是经营好澳新的防御为上