1.It has to be noticed that... 必须注意到，......
2.It's generally recognized that... 普遍认为......
3.What calls for special attention is that... 需要特别注意的是......
4.There's no denying the fact that... 不可否认......
5.As far as...is concerned 就……而言
6.It goes without saying that... 不言而喻，......
7.It can be said with certainty that... 可以肯定地说......
8.As the proverb says， 正如谚语所说的，
9.Further, we hold the opinion that... 此外，我们坚持认为……
10.Owing to ..., we have... 由于……，我们已经……。