available work

• 可用功,有用功

available work的用法和样例：

例句

1. 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。
2. 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。