Now would be a good time, I think, for some introductions.
我想,下面是作些介绍的时候了。
I will come back with him if he asks me.
我会和他走回来,假如他要求我的话。
In this part of the cave, they could hear an insistent booming sound which they found was caused by a small waterspout shooting down into a pool from the roof of the cave.