1.which is which（区分人或事物）谁是谁，哪个是哪个（常常与tell\know等连用）used to talk about distinguishing one person or thing from another，下面我们就来说一说关于inwhich和ofwhich的用法?我们一起去了解并探讨一下这个问题吧!
inwhich和ofwhich的用法
1.which is which
（区分人或事物）谁是谁，哪个是哪个（常常与tell\know等连用）used to talk about distinguishing one person or thing from another
The twins are so alike I can't tell which is which.
这一对双胞胎长得一模一样，我分不清谁是谁。
They all look so alike to me that I'm never sure which is which .
对我来说他们看起来全都非常相似，我永远搞不清哪个是哪个。
It's essential to know which is which as treatments will be quite different.
由于治疗的方法将会全然不同，因此弄清楚哪个是哪个很重要。
Tag the bottles now or we’ll forget which is which.
现在把这些瓶子加上标签，否则将来我们就忘记了哪个是哪个了。
who's to say which is which?谁又分得清现实与幻想？《爱丽丝梦游仙境2 镜中奇遇记》2.what’s what，(词典中还没有发现 what is what)
哪个是哪个，好东西与坏东西，有用的东西无用的东西，青红皂白，什么事情重要，什么事情有用，事情的真相，事情的究竟；事情的诀窍
常与tell\know\learn\show\perceive等连用。
what things are useful, important, etc.
The weeds and the flowers are coming up together, and we can’t tell what’s what.
杂草和话长在一起，我们都没有办法区分哪是杂草哪是花。
She certainly knows what's what.
她当然知道轻重缓急。
You should come across the river with us. Then you will really see what's what.
你应该和我们一起过河，那时你就会了解实情了。
《柯林斯高阶英汉双解学习词典》
He'll show you what's what in time.
到时候他会把事实真相告诉你的。
You have to know what's what and when to draw the line
你必须搞清状况以及自己的底线。
《柯林斯高阶英汉双解学习词典》
Maybe he doesn't look very clever, but he knows what's what.
别看他傻呵呵的，心里可有数。
With so many things mixed up, it's hard to make out what's what.
许多问题绞在一起，闹不清楚。
He can’t tell what's what.他好赖不好。
You are old enough now to know what's what.现在你不小了，应该知道好歹啦。
I kept my ears open and I knew what's what around the office.我一直在注意听，我知道办公室发生了什么。
When it comes to cooking, Jenny know what's what.
谈到烹饪，詹妮是内行。
Linda’s been in the business for thirty years, she know what's what.
琳达在这一行干了30年，她知道这一行的诀窍。
3. who's who“谁是谁”指人们的情况如姓名、工作、身份等，常与know,learn,remember等连用。
When I go to those family reunions, I can never remember who's who.
参加那些家庭聚会的时候，我从来都记不住谁是谁。
It was so dark he couldn’t tell who was who.光线太暗，他分不清谁是谁。
Who's Who名人录，名人词典
He has his name in Who's Who.
他的名字已上了《名人录》。
《汉英大词典》
The list of delegates attending read like a Who's Who of the business world.
与会代表名单读起来像个商界名人录。
