他们的they; their

• 他们俩都是工人。

  They are both workers.

• 他们俩一起来的。

  The two of them came together.

• 来了他们两个人。

  The two of them came.

• 这不是他们的事。

  This is not their business.

• 我是他们的长官。

  I am their superior.