1.A case in point is ... 一个典型的例子是...
2.As is often the case...由于通常情况下...
3.As stated in the previous paragraph 如前段所述
4.But the problem is not so simple. Therefore 然而问题并非如此简单,所以……
5.But it's a pity that... 但遗憾的是…
6.For all that...对于这一切...... In spite of the fact that...尽管事实......
7.Further, we hold opinion that... 此外,我们坚持认为,...
8.However , the difficulty lies in...然而,困难在于…
9.Similarly, we should pay attention to... 同样,我们要注意...
10.not(that)...but(that)...不是,而是
11.In view of the present station.鉴于目前形势
12.As has been mentioned above...正如上面所提到的…
13.In this respect, we may as well (say) 从这个角度上我们可以说
14.However, we have to look at the other side of the coin, that is... 然而我们还得看到事物的另一方面,即 …
1.原因
A number of factors are accountable for this situation.
A number of factors might 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...
2.比较
The advantage far outweigh the disadvantages.
The advantages of A are much greater than those of B.
A may be preferable to B, but A suffers from the disadvantages that...
3.批驳
It is true that ..., but one vital point is being left out.
There is a grain of truth in these statements, but they ignore a more important fact.
Some people say ..., but it does not hold water.
4.后果
It may give rise to a host of problems.
The immediate result it produces is ...
It will exercise a profound influence upon...
5.举例
A good case in point is ...
As an illustration, we may take ...
Such examples might be given easily.
6.证明
No one can deny the fact that ...
The idea is hardly supported by facts.
Unfortunately, none of the available data shows ...
7.开篇
Many nations have been faced with the problem of ...
Recently the problem has been brought into focus.
Recently the phenomenon has become a heated topic.
8.结尾
From what has been discussed above, we can draw the conclusion that ...
It is high time that strict measures were taken to stop ...
It is necessary that steps should be taken to ...