力臂的英文：
the arm of force

arm是什么意思：
n. 手臂；武器；袖子；权力
v. 武装；备战；准备；装备

They went off arm in arm.
他们臂挽臂地走了。

They went off arm in arm.
我们在工作中同心协办，相互配合。

Peter and Jane are walking arm in arm.
彼得和简臂挽臂地走着。

We went skipping down the street arm in arm.
我们挽着胳膊，蹦蹦跳跳地走在大街上。

The joint or bend of the arm between the forearm and the upper arm.
肘关节上臂与前臂之间的关节或胳膊弯曲处

force是什么意思：
n. 军队，暴力
v. 强迫，用力推动

by (main) force
用蛮力, 全靠气力; 以最大的力气

The force is spectacular!
这个瀑布很壮观！

resultant force
合力

The threat will force greater dispersion of their forces.
恫吓将迫使他们把兵力铺得更广。

The tension force, shear forces (including pushing force, cutting force and friction force), impulse force, hydrodynamic drag on the suction pipes, and the force resulted from the pressure difference, etc, are the main forces for detail discussion in this paper.
详细讨论了主要作用力：在波浪补偿器作用下的缆绳拉力、耙头与海床间的土壤剪切力、作用在耙吸管上的水流阻力及由于压力差在耙头处产生的推动力等。