过渡句
例1.This is not necessarily the case, however.
例2.We want to keep up with the times.
例3.Good intentions alone are not enough.
例4.It was indeed the case.
例5.But modern research has found that this is not so.
例6.But it is now thought that this in not so.
例7.What does this mean as far as our flying saucer program is concerned?
例8.As for as I am concerned, s
