那些帮助减轻劳动的机械不知从哪个时代就有了。比如，磨坊，在乔叟时代就是古老的了。
Eg: What aids there were to lighten labour were immemorial, like mill, which was already ancient in Chaucer's time.
比如磨坊，在乔叟的时候就已经是古老的了。
译：那些帮助劳动的机械都不知从哪个年代就有了，比如磨坊，在乔叟的时代就已经是古老的了。
What aids there were to lighten labor were immemorial, like the mill, which was already ancient in Chaucer's time.
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