U.S. troops surprised eight enemy fighters in a cave complex.

美国军队在一个洞穴群里出其不意地抓获了8名敌军士兵。

《柯林斯英汉双解大词典》

The reservoir space of complex reservoirs is composed of pore, fracture and cave.

复杂储层储集空间由孔、缝、洞组成，具有很强的非均质性。

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Understand that fear is a component of stress, the complex fight-or-flight response ingrained in us since the cave days.

要明白恐惧是压力的一个组成部分，它是一种与穴居时代俱来的“要么对抗，要么逃跑”的复杂反应。

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The site includes a cave complex, dive pool and roadways.

BBC: Bicester bomb disposal training base opens

Art historians at the University of Chicago have digitally recreated another Buddhist cave temple complex at Xiangtangshan in northern China, where many of the site's original sculptures have been lost or removed.

BBC: Digital Chinese caves preserve history

The Dunhuang Academy, which promotes and protects the complex of 492 cave temples, is planning to permanently install digital reconstructions of a number of the caves.

BBC: Digital Chinese caves preserve history