Several man-made ponds will also be excavated for drainage purposes.

此外，当局亦会挖掘数个人造池塘作排水之用。

There's nothing. We've seen ourselves there's nothing in those caves, they are excavating for the first time, it's natural.

根本什么也没有。我们自己亲眼所见那些洞穴里一无所有, 他们第一次挖掘, 这很自然的。

Professor Jacque G. has been excavating in and around the ancient city for five years. He says vehicle pollution affects the stone as well.

Jacque G.教授5年来一直在挖掘研究这座古城。他说，机动车污染也对这些石头造成影响。