_1、as is known to all, it is important to be/do …
_众所周知，重要的是……
_2、i think there are at least two reasons for …
_我认为至少有两个原因……
_3、for one thing,… for another , …
_其中之一，另一个是……
_4、let’s take … for example …
_我们以……为例……
_5、from what i have mentioned above we can see that without … we cannot …
_从上述我提到的可以看出如果缺少……我们就不能……
_6、it is clear that,… plays an important part in …
_很明显，……在……方面起着重要作用。
_7、it is because … that …
_因为……
_8、different people, how*r , have different opinions on this matter .some people think that …
_但是，不同人对待这个事情上有不同的看法。有些人认为……
_9、others argue that …
_另一些人认为……
_10、according to them, all of us should …
_按照上述内容，我们全部都应当……
_11、in their opinion, nobody can … without…
_他们认为，如果没有……没有人可以……
_12、compared with …, … has a lot of advantages over …
_与……相比，……比……有很多优势。
_13、there is no doubt that …
_毫无疑问
_14、in short (in brief /in a word), i firmly support the view that …
_简而言之(简要的说/一句话)，我坚定地支持……的观点。
_15、so my conclusion is that …
_所以，我的结论是……
___