Let me take an X-ray of your teeth to see if you have any decayed areas or cavities?

让我照个x光，看看你的牙齿有没有蛀烂的地方或牙洞。

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The fluoride mixes with enamel, the hard surface on teeth, to help prevent holes, or cavities, from forming.

氟化物内含有坚固牙齿表面，抑制蛀牙或牙斑形成的珐琅。

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It contains artificial sweeteners called xylitol or sorbitol that help prevents cavities.

无糖口香糖里含有人工合成的制糖剂木糖醇或山梨糖醇，有助预防蛀牙。

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The fluoride mixes with enamel, the hard surface on teeth, to help prevent holes, or cavities,from forming.

VOA: special.2009.03.11

Thyroid nodules may also be cysts, fluid-filled cavities, or swellings caused by thyroid inflammation.

CNN: Tipper Gore released from hospital

At a recent golf-industry show, however, the U.S. working group displayed examples of counterfeit clubheads sawed in half, and you can see the type of irregularities that impact performance: irregular interior walls, or supposedly hollow iron-head cavities that instead are solid steel.

WSJ: Psst��Wanna Buy a Counterfeit Golf Club? | Golf Journal by John Paul Newport

The 62-year-old former nurse from Menlo Park, Calif. suffered from chronic sinusitis, a recurring inflammation of the cavities behind the eyes and nose commonly caused by bacterial or viral infections.

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