•Sugar makes your teeth decay.糖能引起蛀牙。

•The role of the extended family has been decaying for some time.大家庭的作用开始减弱已经有一段时间了。

•Pollution has decayed the surface of the stonework on the front of the cathedral.大教堂前部的石刻表面已经因为污染受到了侵蚀。

•the smell of decaying meat腐肉气味

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•environmental/industrial/moral/urban decay环境恶化／工业衰退／道德堕落／城市衰落

•dental/tooth decay蛀牙

•The buildings had started to fall into decay.那些建筑已经开始败坏了。

•This industry has been in decay for some time.这行业早就开始息微了。