as far as ... be concerned

1. 就……而言

As far as we're concerned you can go whenever you want.

就我们而言, 你什么时候走都行。

be concerned with

1. 关于; 与……有关

His new book is concerned with Africa.

他的新作是关于非洲的。


习惯用语be much concerned about1.十分挂念