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》

Yes, so there's two kinds of limestone caves.

是的，所以有两种石灰岩洞穴。

youdao

It's one of the longest and deepest limestone caves not just in the country but in the world.

它不仅是美国最长最深的石灰岩洞穴之一，也是世界上最长最深的石灰岩洞穴之一。

youdao

Guides explain that it did not result from the action of water and streams like other limestone caves.

VOA: special.2009.12.07

Miyamoto fans have made pilgrimages to some of the larger limestone caves near Sonobe.

NEWYORKER: Master of Play

As a teenager she started exploring the limestone caves in the Mendip Hills near her home in Bristol, England.

FORBES: Mavericks

He was describing the multitude of caves that puncture the limestone slopes that spread across Asturias, Cantabria and Castilla y Leon regions in northern Spain.

BBC: Spain��s mountains made of cheese