1）……Such defects as mentioned above can be prevented by the other way of ……
2） Except for ……’s sake only.
3） Perhaps A is the wrong word，however，B might be better.
4） First……last but not least……
5） Shall we do this？ Not necessary the case.
7） On the contrary，in spite of these increase……
8） Compared with A，B has many advantages such as……
9） Not so much…… as he had talked about.
10） ……，the truth of the matter，however，is that……
11） For some，the way maybe right，nevertheless，for many others……
12） As everything going to the extreme has its negative aspects，so has……
13） It is fairly well know that……however，it is less know that……
14） ……，but this was not always the case.
15） At first，……different in their opinions，on second thoughts，however，all of them agree to……
16） None the less（尽管如此）……
17） When people succeed，it is because of hard work，however，luck has a lot to do with it too.
18） ……，sometimes it isn’t totally the case，however.
19） Do some A else but B.