不了解

I do not know what is in the heads of the youth.

我不了解这些年轻人的脑子里想的是什么。

I have no idea what is going on in these young people's heads.

我不了解这些年轻人的脑子里想的是什么。

I don't know what's going on these young people's heads.

我不了解这些年轻人的脑子里想的是什么。

I don't understand what's going on insidethese young people's heads.

我不了解这些年轻人的脑子里想的是什么。

I don't know what are the young people thinking about in their heads.

我不了解这些年轻人的脑子里想的是什么。

I don't understand what's going on inside with these young people's heads.

我不了解这些年轻人的脑子里想的是什么。

I do not understand what's going on inside those young people's heads.

我不了解这些年轻人的脑子里想的是什么。

Hearn, you don't appreciate the issues involved.

候恩，这里边涉及的一些问题你不了解。

This certainty of the morrow gave zest and enthusiasm to life, and the County people enjoyed life with a heartiness that Ellen could never understand.

对于未来的这种绝对把握使生活充满了激情和热望，而县里的人都在以一种爱伦所不了解的全心全意的态度享受着这种生活。

If I didn't know you I might think you were heartless !

要是我不了解你，我会认为你是一个没有心肺的人。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。