Its surface is covered by a thick carpet of cockroaches, 地面上爬满了密密麻麻的蟑螂
And over millions of years this acid eats away the limestone 石灰岩经过几百万年的酸蚀作用
creating a maze of caverns and passages 形成了迷宫般的溶洞和通道
But the dissolving power of rainwater has other, much more dramatic effects underground. 不过在地下 雨水的溶解作用 还能产生其它更壮观的效果
When the water reaches the more resistant bed of limestone 当水流遇到更坚硬的石灰岩床时
are a reminder of this link with the sea. 能说明石灰岩与海洋的关系
Originally, this whole area would have been one solid block of limestone, 起初 这整个地方都是 一整块坚固的石灰岩床
Limestone is composed of minerals derived from marine shells and corals, 石灰岩由海螺和 珊瑚中的矿物沉积后形成