used work的用法和样例：
例句
- In any machine the useful work done by the machine is always less than the work done on the machine.
在任何一部机器里，机器所完成的有用功总是小于对机器所作的功。 - We want to make machines more efficient for the purpose of getting more useful work out of them.
我们希望把机器造得效率更高，以便从中得到更多的有用功。
used work的相关资料：
临近单词
used in
used
Used for with eight-basket oven.
used and crapped radioactive sources
Used to catch someone's attention.
used as currency in Massachusetts.
Used Electric Water Heater 'Zanussi'
Used medicinally as a diaphoretic.
used informally as an intensifier.
used mechanic - electric equipment
Used to express emphatic negation.
Used medicinally to treat arthritis.
