what do you mean by ——?具体介绍一下

by 后可接名词性结构
What do you mean by ...
是你不明白对方为何要做某事或为何这样说,询问意思或意图的句型,
比如说 what do you mean by beauty?
what do you mean by The tax systerm isn't fair?你说的税收不公正是什么意思
what do you mean by this word?=
what' the meaning of this word =
what does this word mean?
^ _ ^