Be careful, I think the neighbors have been spying on us.
小心点,我觉得我们邻居一直在窥视我们。
I'm playing ping-pong downstairs.
我在楼下打乒乓球。
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.