2、it goes without saying that... 不言而喻，......
3、it can be said with certainty that... 可以肯定地说......
4、it has to be noticed that... 必须注意到，......
5、its generally recognized that... 普遍认为......
6、what calls for special attention is that... 需要特别注意的是......
7、theres no denying the fact that... 不可否认......
8、nothing is more important than the fact that... 没有什么比......更重要
9、today, ..., which have brought a lot of harms in our daily life. first, ... second, ... what makes things worse is that... 现在，……，它们给我们的日常生活带来了许多危害。首先，……;其次，……。更为糟糕的是……