a — used in expressions like as/so far as I know to say that you think a statement is true but that there may be something you do not know which makes it untrue据我所知;以我之见
It's safe, as far as I know. [=based on what I know, I think it's safe, although it is possible that it is not safe]据我所知,这是安全的。
The investigation isn't making much progress, as far as I can see/tell/judge.依我看/判断,那项调查目前没有大的进展。
b — used in expressions like as/so far as (something) goes and as/so far as (something) is concerned to mean “about (something)” or “with regard to (something)”关于(某事物);至于(某事物)
He has no worries as far as money is concerned. [=he has no worries about money]他不为钱的问题发愁。
As far as the weather is concerned, we've been having nothing but rain for the past week.至于天气,过去一周我们这里一直在下雨。
c — used in expressions like as/so far as (someone) is concerned to mean “in someone's opinion”依(某人)看;在(某人)看来
As far as I'm concerned [=in my opinion], everything he says is a lie.依我看,他满嘴谎话。
As far as she's concerned, he's perfect.在她看来,他是完美的。
2
informal:with regard to (something or someone)至于(某事或某人)
He's here. As far as [=as for] the others, they'll arrive later. [=the others will arrive later]他来了。至于其他人,他们随后就会到。