What about fast food joints and Starbucks? Do I need to tip?

那小的快餐店和星巴克呢？我需要给小费吗？

Her joints ache if she exercises.

她的关节一运动就疼。

Most artificial joints are cemented into place.

绝大部分人造关节是被黏结复位的。

Check that joints are secure and the wood is sound.

检查接头是否牢固，木头是否完好。

You should try not to place too much strain on muscles and joints.

你要尽量不让肌肉和关节太吃力。

Inactivity can make your joints stiff, and the bones may begin to degenerate.

不活动会使关节僵硬，骨骼因此可能会开始退化。