what's whatSITUATIONthe real facts about a situation that are important to know 事情的真相 She’s been working here long enough to know what’s what. 她已经在这里工作很长时间了，很了解情况。
what’s what• I am a fly on the face of the Almighty, crawling over the surface to see what's what.• He tells his mates what's what, and they laugh when he does.• I keep my ears open and I know what's what around the office.• So let's start by taking a look at what's what in floorcoverings.• What's what in the psychic world?• I like to think our academic standard's gone up, and we know what's what in the world.
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