adj.省工的；节省劳力的；减轻劳动的
=labour-saving(英).
The increase in their profits is due partly to their steady production of labor saving devices. 他们利润增长的部分原因是由于源源不断生产出节省劳力的器具。
What aids there were to lighten labor were immemorial, like the mill, which was already ancient in Chaucer's time. 那些帮助减轻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，而工业革命就是从这些机械开始的。
