1.It's said that... 据说……
2.As we all know that... 我们都知道……
3.It's well known that... 众所周知……
4.As/So far as I know... 据我所知……
5.It is clear/obvious that... ……是显而易见的
6.to begin with 首先
7.in conclusion 最后
8.in brief,in a nutshell 简言之
9.in a word 总之
10.however 然而;可是
1、first/firstly 第一
2、first of all 首先
3、to begin/start with 首先
4、in the first place 首先
5、second/secondly 第二
6、next 其次;然后
7、and then 于是;然后
8、meanwhile/at the same time 同时
9、finally/eventually/at last/in the end 最终