Large caves, tectonic fault zone, lining the tunnel wall grouting.

大洞穴、构造断裂带、隧道衬砌壁后注浆。

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The large limestone caves are also quarried for cement.

这些大石灰岩洞也用来开采水泥原料。

《柯林斯英汉双解大词典》

In Europe, prehistoric tribes sought shelter in caves and later constructed increasingly large and reverberant temples and churches.

在欧洲，史前部落在山洞里寻求庇护，后来建造越来越大，越来越混响的庙宇及教堂。

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For a time they stored large amounts of ammunition in ancient caves built into the cliff at the feet of the largest of the two Buddhas.

BBC: A visit to the giant Buddhas