Imagine a swimmer in water over his head You are in deep water when you are facing a problem that you do not have the ability to solve.

VOA: special.2009.05.10

But think of the various periods during the night in which you are in a deep, deep dreamless sleep.

但请设想你处在这样的夜晚,你处于熟睡，安枕无梦。

耶鲁公开课 - 死亡课程节选

It's very deep within the brain and if it gets damaged you could— you are likely to die.

延脑位于大脑深处,如果它受到损伤的话,你可能会,你很可能会死掉

耶鲁公开课 - 心理学导论课程节选

When you put a small seedling in, the roots are not deep enough to go into that water reservoir, so we need to bring the water up to the plant."

VOA: special.2011.06.14

"That's where the majority of the lobsters are, they're in the deep water." "That's where the channels are, so you gotta compete with the ships.

VOA: standard.2010.07.20