1. Otherwise 否则，不然
2. obviously 显然
3. frankly 坦率地说
4. briefly 简单地说
5. indeed 的确
6. honestly 真的
7. fortunately / luckily 幸好
8. I believe 我相信
9. I wonder 我不知道
10. in the first place 首先
11. in addition 此外
12. of course 当然
13. for instance / example 例如
14. strictly speaking 严格地说
15. generally speaking 一般来说
16. judging from... 根据……判断
17. that is 也就是说
18. it seems 看来是
19. in fact / as a matter of fact 事实上
20. needless to say 不用说
21. strange to say 说也奇怪
22. to tell the truth 老实说
23. in a few words / in sum / in short 简而言之
24. to sum up 概括地说
25. I am sure 我可以肯定地说
26. luckily / happily for sb. 算某人幸运
27. most important of all 最为重要的是
28. what is important/ serious 重要 / 严重的是
29. in general 一般而言
30. in other words 换句话说
31. in a sense 在某种意义上
32. in my view / as I see it 在我看来
33. from my point of view / from my perspective / viewpoint 我认为
34. in conclusion 总之
35. in summary 概括地说
36. however 然而