翻譯如下：
Many mills stayed in use until the end of the 19th century,
許多轉(zhuǎn)輪直到19世紀(jì)末還在使用,
but they had been in the process of being replaced by the steam engine as a source of power for the previous 150 years．
然而在最近150年里它們正逐漸被蒸汽機(jī)取代作為新的能量來源.
The transmission of the power generated by the waterwheels was by shafting and crude gears or pulleys．
水輪產(chǎn)生動(dòng)能的傳遞方式是用桿柄帶動(dòng)齒輪或滑輪的運(yùn)動(dòng).
The steam engine for the first time employed an enclosed moving stream of fluid(steam) under pressure
而蒸汽機(jī)首次采用在封閉環(huán)境內(nèi)加壓產(chǎn)生流動(dòng)氣流（蒸汽）（的方式供能）
the principle to be later employed in hydraulic power transmission
這個(gè)原理后來被廣泛應(yīng)用到液壓能量傳遞中
for transmitting power continuously from the point of generation to the place where it was used.
以實(shí)現(xiàn)能量從產(chǎn)生到被使用間一個(gè)連續(xù)不間斷的過程.（即實(shí)現(xiàn)了自動(dòng)化）