英语语法分析

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。

Those are limestones.

山上都是石灰岩。

There are four principal types of limestones.

石灰岩有四种主要类型。