as it is shown by the graph...这中情况下有一个it

as it is = 实际上；副词as it is:
1.in the actual state of affairs and often contrary to expectations
例句与用法:
1.I hope things would get better,but as it is they are getting worse.我希望情况会好转,但实际上是越来越糟.
2.I have to leave it as it is.=我只好随它去了.
3.He isn't nice.As it is,he is bad.= 他不好.事实上,他很坏.
4.This room is as broad as it is long.=那个房间长宽相等.
5.I don't like him.As it is,I hate him.=我不喜欢他.事实上,我恨他.
6.Be that as it may,I'll leave it as it is.=无论如何我们也只能听其自然.
7.As it is,we can hardly get to the station by 6 o'clock.=但事实上,我们几乎不能在六点以前赶到车站.
8.I thought he would get better.As it is,he is getting worse.=我以为他会变好.但事实上,他愈变愈糟.

没区别
as is 后面加过去分词时候，前面的is可以省略也可以不省略

sf谁能说说着两中情况有什么区别？