这主要是因为，通常，当小小的电机高速运转时，虽然能提供足够的功率，但不能提供足够的力矩。

This is key because, often, a small motor spinning very fast can provide enough power for a device, but not enough torque.

youdao

当今的社会就象一部高速运转的机器，人们迷失在对物质追求的旋涡中不能自拔。

The modern society is just like a rapidly working machine and people lose in the whirlpool in purchase of material from which they can't escape.

youdao