知识扩展

词语辨析
cavity，cave，hole。 这组词都有“洞”“孔”“穴”的意思。它们的区别在于：hole指任何物体中的开口、穿孔或洞穴；cave指山洞、洞穴或地窖；cavity是科技术语或专门用语，只指坚硬物体上的洞穴，通常表面有开口可见。例如：The men have dug a hole in the road.那些人在路上挖了一个洞。The cliff dwellers found that natural caves gave them warmth and protection during the Ice Age.悬岩洞人发现在冰河时代天然的洞穴不仅温暖，还能借以自卫。The pleural cavity is a body where the lungs are situated.胸膜腔是人体内肺脏所在的地方。 词组短语 oral cavity n.口腔；nasal cavity鼻腔

中文词源： cavity
精选例句

常见考点例句：

When the hospital collapsed , he was trapped in a cavity beneath the stairs .

当医院倒塌时，他被埋进楼梯间下放的洞里。

In all lasers , light is repeatedly reflected within a mirrored cavity .

在所有的激光器中，光都在一个反射腔中重复反射。

The two qubits are separated by a cavity that contains microwaves , and the whole system connected to an electric current .

两个量位被含有微波的腔洞隔开，整个系统连到了一个电流。

A non-dye heart , a little zen itself , so that the days wonderful , there are cavity tune .

一颗无染心，一点自在禅，让日子有滋有味，有腔有调。

Its use has been instrumental in the dramatic drop in tooth decay and cavity occurrence that has taken place over the past 50 years .

氟的使用已经在显著减少牙齿腐蚀和生牙洞发生当中起作用，而这些影响已经在过去的五十年来发生。