1.As far as ...is concerned
　　2.It goes without saying that...
　　3.It can be said with certainty that...
　　4.As the proverb says，
　　5.It has to be noticed that...
　　6.It`s generally recognized that...
　　7.It`s likely that ...
　　8.It`s hardly that...
　　9.It’s hardly too much to say that...
　　10.What calls for special attention is that...需要特別注意的是
　　11.There’s no denying the fact that...毫無疑問，無可否認(rèn)
　　12.Nothing is more important than the fact that...
　　13.what’s far more important is that...