表示证明

　　No one can deny the fact that…

　　The idea is hardly supported by facts.

　　Unfortunately, none of the available date shows…

　　Recent studies indicate that…

　　There is sufficient evidence to show that…

　　According to statistics proved by…, it can be seen that…

　　表示原因

　　A number of factors areaccountable for this situation/ contribute to (lead to)(account for) the phenomenon(problem)

　　The answer to this problem involves many factors.

　　The phenomenon mainly stems from the fact that…

　　The factors that contribute tothis situation include…

　　The change in… largely results from the fact that…

　　Part of the explanations for itis that…

　　One of the most common factors(causes) is that…

　　Another contributing factor(cause) is…

　　Perhaps the primary factor is that…

　　But the fundamental cause is that…

　　开头

　　Recently the phenomenon has become a heated topic

　　Recently the problem has been brought into focus.

　　Nowadays there is a growing concern over…

　　What calls for special attention is that…

　　It is common knowledge that…

　　It is well-known that…

　　Many nations have been faced with the problem of…

　　According to a recent survey…

　　With the rapid development of…

　　结尾

　　From what has been discussed / mentioned above, we may conclude that…

　　Therefore, it is not difficult to draw / come to the conclusion that…

　　As far as I am concerned, I agree with the latter opinion to some extent.

　　From all the seasons/ consideration above, it is clear/ obvious that…

　　Taking into account all these factors, we may reach the conclusion that…

　　Given the reasons/consideration I have just outlined/ discussed/ presented, I strongly recommend that…

　　All in all, what really matters is…

　　It is essential that effective measures be taken to…

　　From what has been discussed above, we may reasonably draw the conclusion that…

　　As a result, we should take some effective steps to…

　　Judging by the figures/statistics, it is not difficult to see that…