后座力的英文：
kick
recoil

参考例句：

A rifle with a heavy kick.
后座力很大的步枪

Safety backlash on that weapon's a hundred meters.
该武器的安全后座力是一百公尺。

This product has zero backlash.
本产品为零后座力。

Just like the kick from a gun firing bullets, each chunk cast off produces a recoil.
就像发射子弹的枪会产生后座力一样，每发射一块岩石都会产生一个后座力。

kick是什么意思：
v. 踢，蹬；戒除（恶习）；反冲；反对，反抗
n. 踢，蹬；反冲，后座力；极度兴奋

This is side kicking.
这就是侧面踢腿。

The assassin kicked up a shine.
刺客引起了大骚动。

The horse kicked him in the rear.
马蹄踢在他的屁股上。

Do not kick against the pricks.
勿踢刺棍；勿以卵击石。

Do not kick and never stumble.
不要踢永远不要跌倒。

recoil是什么意思：
n. 弹回；反冲；反作用；畏缩
v. 畏缩；弹回；报应

She recoiled with a shudder.
她颤抖着退缩了。

Their atrocities recoiled on themselves.
他们的暴行报应到自己的身上。

You recoiled away from anything of the sort.
你对这类事总是唯恐躲之不及。

Recoil from murder,violence,etc
畏惧凶杀、暴力等.

You have to learn not to recoil from touching the insects.
你必须学会碰到昆虫而不退缩。