serviceable

形容词 serviceable:

1. ready for service or able to give long service
2. capable of being put to good use
3. intended or able to serve a purpose without elaboration;

1. He stated that in six weeks rush work would be required to repair the boilers to make them serviceable.
   他说，修理这这些锅炉，使之可以使用，需要六周的紧张工作。
2. The tyres are worn but still serviceable.
   这些轮胎已磨损，但尚可用。