A case in point is ...

　　As is often the case...

　　As stated in the previous paragraph如前段所述

　　But the problem is not so simple. Therefore然而问题并非如此简单，所以……

　　But it’s a pity that...

　　For all that...In spite of the fact that...

　　Further, we hold opinion that...

　　However , the difficulty lies in...

　　Similarly, we should pay attention to...

　　not(that)...but(that)...不是，而是

　　In view of the present station.鉴于目前形势

　　As has been mentioned above...

　　In this respect, we may as well (say)从这个角度上我们可以说

　　However, we have to look at the other side of the coin, that is...然而我们还得看到事物的另一方面，即…