表原因的句型:
1 The reason why.is that.
2 One may think of the change as a result of.
3 This brings out the important fact that.
4 There are several causes for this significant growth
表结论的句型:【=听-力—课_^堂^_网^归纳】:
1 There is no doubt that attention must be paid to.
2 Obviously/Apparently,if we want to.,it is necessary...
3 From what has been discussed above,we can drew the conclusion that.