These problems are all in your mind, you know.
你知道，这些问题都只是你的'凭空想象而已。
Some people don't know when they're well off.
有些人身在福中不知福。
You'll like her once you get to know her.
你一旦了解了她就会喜欢她的。
Children can be difficult as we know only too well.
小孩子往往很难对付，对此我们都非常清楚。
He's really very human when you get to know him.
你若了解他，就知道他确实很有人情味。
There were a whole lot of people I didn't know.
有许多人我都不认识。
All I know is that she used to work in a bank.
我只知道她曾在银行工作过。
I don't know what you're on about.
我不懂你在谈什么。