论证和说明

　　1. As it is described that…

　　2. It has been illustrated that…

　　3. It provides a good example of…

　　4. We may cite another instance of…

　　5. History man provides us with the examples of…

　　6. A number of further facts may be added…

　　7. the situation is not unique, it is typical of dozens I have heard.

　　8. A recent investigation indicate that…

　　9. According to the statistics provided …

　　10. According to a latest study, it can be predicted…

　　11. There is no sufficient evidence to show that…

　　12. All available evidence points to the fact that…

　　13. Examples given leads me to conclude that…

　　14. It reveals the unquestionable fact that…

　　15. The idea may be proved by facts…

　　16. All the facts suggest that…

　　17. No one can deny the fact that…

　　18. We may face the undeniable fact that…