as far as用法

That's because as far as my parents are concerned, Ross can do no wrong.---《老友記》 第一季 第二集

因为在我爸妈心目中，罗斯不可能犯错。

1.

远到...
They walked as far as the lake.
他们一直走到湖边。

2.

尽...;就...
I'll help you as far as I can.
我将尽我所能帮助你。