Perhaps the primary factor is that

But the fundamental cause is that

二）比较

1。The advantage far outweigh the disadvantages。

2。The advantages of A are much greater than those of B。

3。A may be preferable to B， but A suffers from the disadvantages that。。。

4。It is reasonable to maintain that 。。。but it would be foolish to claim that。。。

5。For all the disadvantages， it has its compensating advantages。

6。Like anything else， it has its faults。

7。A and B has several points in common。

8。A bears some resemblances to B。

9。However， the same is not applicable to B。

10。 A and B differ in several ways。

11。 Evidently， it has both negative and positive effects。

12。 People used to think 。。。， but things are different now。

13。 The same is true of B。

14。 Wondering as A is ，it has its drawbacks。

15。 It is true that A 。。。 ， but the chief faults （obvious defects ）are 。。。

三）批驳

1）It is true that 。。。， but one vital point is being left out。

2） There is a grain of truth in these statements， but they ignore a more important fact。

3） Some people say 。。。， but it does not hold water。

4） Many of us have been under the illusion that。。。

5） A close examination would reveal how ridiculous the statement is。

6） It makes no sense to argue for 。。。

7） Too much stress placed on 。。。 may lead to 。。。