1. One may regard the phenomenon as a ...

　　2. There are many for this dramatic growth/decrease. First, ... Second, ... Finally, ...

　　3. A number of factors can account for the change in ...

　　4. Another contributory factor of ... is ...

　　5. Why ...? Perhaps the primary reason is ....

　　6. ... is also responsible for the in ...

　　2、观点陈述：

　　1. Although a lot of people believe that ..., I whether the argument bears

　　2. As opposed to widely held ideas, I that ...

　　3. Although the popular is that ..., current indicates that ...

　　4. They may be right about ..., but they seem to to the fact that ...

　　5. Although it is widely accepted that ..., it is unlikely to be true that ...

　　6. It is true that ..., but that ...

　　7. There is/are reason for us to that ...

　　8. What these people fail to is that ...

　　9. may that .... It probably will. But ...

　　10. It is one thing to believe that ..., but it is quite another to say that ...

　　3、利弊说明：

　　1. The advantages of A outweigh any benefit we gain from B.

　　2. Good as A is, it has its own disadvantages. For one thing, it ...; for another, it ....

　　3. Although A has advantage over B ..., it can not compete with B in ...

　　4. As advantage when Bs advantages are considered.

　　4、举例论证：

　　1. Numerous examples can be given, but this/these will suffice.

　　2. I can think of no better illustration than the following one(

　　3. This case effectively clarify the fact that

　　4. This story tells that

　　1. One may regard the phenomenon as a ...

　　2. There are many for this dramatic growth/decrease. First, ... Second, ... Finally, ...

　　3. A number of factors can account for the change in ...

　　4. Another contributory factor of ... is ...

　　5. Why ...? Perhaps the primary reason is ....

　　6. ... is also responsible for the in ...

　　2、观点陈述：

　　1. Although a lot of people believe that ..., I whether the argument bears

　　2. As opposed to widely held ideas, I that ...

　　3. Although the popular is that ..., current indicates that ...

　　4. They may be right about ..., but they seem to to the fact that ...

　　5. Although it is widely accepted that ..., it is unlikely to be true that ...

　　6. It is true that ..., but that ...

　　7. There is/are reason for us to that ...

　　8. What these people fail to is that ...

　　9. may that .... It probably will. But ...

　　10. It is one thing to believe that ..., but it is quite another to say that ...

　　3、利弊说明：

　　1. The advantages of A outweigh any benefit we gain from B.

　　2. Good as A is, it has its own disadvantages. For one thing, it ...; for another, it ....

　　3. Although A has advantage over B ..., it can not compete with B in ...

　　4. As advantage when Bs advantages are considered.

　　4、举例论证：

　　1. Numerous examples can be given, but this/these will suffice.

　　2. I can think of no better illustration than the following one(

　　3. This case effectively clarify the fact that

　　4. This story tells that