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1·Cavities in teeth are caused by decay.

牙齿上的空洞是由龋蚀造成的。《新英汉大辞典》

2·Large quantities of water may also be stored in limestones when joints and cracks have been enlarged to form cavities.

当接缝和裂缝扩大形成空洞时，大量的水也会被储存在石灰岩中。

3·The ventral cavity includes the thoracic and abdominopelvic cavities and their subdivisions.

腹侧腔包括胸腔和盆腹腔及其细分。

4·These two compartments are synovial cavities, which consists of an upper and a lower synovial cavity.

这两个隔室是滑膜腔，由上、下滑膜腔组成。

5·Coffee can fight cavities.

咖啡可以预防龋齿。

6·These ones assist in preventing cavities.

这些能帮助防止蛀牙。

7·Coffee can protect your teeth from cavities.

咖啡能洁牙。

8·Are there certain foods that might cause cavities?

是否有某些食物可能导致蛀牙？

9·By contrast, some foods actually help prevent cavities.

相比之下，一些食物确实有帮于防止蛀牙。

10·Do you or your family members get cavities frequently?

你和你的家人经常患有龋齿吗？

(1)oral cavityn. 口腔

(1)nasal cavity鼻腔

(1)abdominal cavity腹腔

(1)mold cavity模穴；铸模型腔；结晶苹

(1)pelvic cavity骨盆腔，盆腔

(1)die cavity刚模穴；阴模