1. To begin with,
2. Firstly,
3. Secondly,
4. In addition,
5. Moreover,
而且，
6. Furthermore,
7. On the one hand,
一方面，
8. On the other hand,
另一方面，
9. However,
然而，
10. Nevertheless,
然而，
11. In conclusion,
总结而言，
12. To sum up,
总结而言，
13. In my opinion,
在我看来，
14. From my perspective,
从我的角度来看，
15. According to statistics,
根据统计数据，
16. It is widely believed that,
人们普遍认为，
17. It is undeniable that,
不可否认的是，
18. It is well-known that,
众所周知的是，
19. It is important to note that,
值得注意的是，
20. It is worth mentioning that,
值得一提的是，