力效率的英文：
force efficiency

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。

efficiency是什么意思：
n. 效率，功效；提高功效的方法

The service productivity is the function, including external efficiency, intestine efficiency and capacity efficiency.
服务业的生产率是一个包含有外部效率、内部效率和能力效率的函数。

The efficiency of the tandem system is perfect.
这个串联系统的工作效率无可挑剔。

To destroy or hinder the efficiency of; frustrate.
使不起作用使无效或限制其效力的发挥；阻挠、挫败

He is an efficient manager.
他是一位办事效率高的经理。

Their labor efficiency is very high.
他们的工作效率很高。