A dentist fills decayed teeth.
牙医填补龋齿。
小，弱或蛀牙。
我有两颗龋齿。
Decayed teeth can cause pain and can cost a lot to fill.
侵蚀的牙齿会带来疼痛，并且要花很多钱来修补。
Not only do decayed teeth hurt, they have an awful odor.
蛀牙不能会伤害牙齿，还会产生一种可怕的气味。
Yesterday I went to the dentist to pull out one of my decayed teeth.
昨天我去牙科医生那儿把我的一颗蛀牙拔掉了。
Her teeth decayed because she ate too many sweets.
她的牙齿因贪吃甜食而蛀坏。
Her teeth decayed because they were not taken care of.
她的牙齿因没小心保护而变坏了。
Some of her teeth were very badly decayed.
她有些牙齿烂得很厉害。
Some of her teeth were very badly decayed.
她有些牙齿烂得很厉害。
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