1. It is considered /thought that 人們(有人,大家)認為
　　2. It is generally /usually accepted /agreed/recognized that 普遍(一般,通常)認為
　　3. It is believed that -有人(人們,大家)相信
　　4. It is well-known that 大家知道(眾所周知)
　　5. It is said that 據說(有人說)
　　6. It is learned that 據聞(悉)
　　7. It is supposed that據推測
　　8. It is estimated/predicted/calculated that據估計(預計
　　9. It must be pointed that 必須指出
　　10. It is reported that據報道
　　11. It must be admitted that必須承認
　　12. It will be seen that 可見(可以看出)
　　13. It will be seen from this that 由此可見
　　14. It is understood that不用說(都知道)
　　15. It can not be denied that無可否認
　　16. It has been proved/demonstrated that已經證明
　　17. It may be confirmed that 可以肯定
　　18. It may be safely said that可以有把握地說
　　19. It is sometimes asked that人們有時會問
　　20. It is expected that/hoped that人們希望
　　21. When it comes to 要說到,要談及