rotary motion

基本解释

With the right configuration of muscles it is even possible to produce rotary motion.
只要配置得当，它甚至还能产生旋转运动。
That was useful for pumping, but limited the engine’s application to things that require a rotary motion—grinding, for example.
这适用于抽水的水泵，却不能运用于诸如研磨机这类其他需要旋转移动的机器，限制了蒸汽机的应用。
With the possible exception of the propeller-like flagella of bacteria, there are no examples of organisms that use muscles to create continuous rotary motion.
也许细菌那像螺旋桨似的鞭毛是个例外，但其他有机体是无法用肌肉产生持续不断的旋转运动的。