fallen in with

Soon she has fallen in with a tough crowd and has become a yanki, what basically amounts to a juvenile delinquent.

不久她爱上了一个古惑仔，成了一个太妹——基本上算得上是个少年犯。

But she is a girl, I fear if she has fallen in with a outlaw, I can't image.

但是她是个女生，我怕万一碰上个歹徒…我真不敢想。

I fear I have fallen in with a desperate outlaw!

我真怕我是碰到了一个不要命的歹徒！

In fact, I have fallen in with your teacher today.

实际上，我今天碰见你的老师了。

He has fallen in with some strange people.

他跟一些奇怪的人勾搭上了。

it true that you have fallen in with them?

你真的同意他们的意见吗？