1.A case in point is ... 一个典型的例子是...
2.As is often the case...由于通常情况下...
3.As stated in the previous paragraph 如前段所述
4.But the problem is not so simple. Therefore 然而问题并非如此简单，所以……
5.But it's a pity that... 但遗憾的是…
6.For all that...对于这一切...... In spite of the fact that...尽管事实......
7.Further, we hold opinion that... 此外，我们坚持认为，...
8.However , the difficulty lies in...然而，困难在于…
9.Similarly, we should pay attention to... 同样，我们要注意...
10.not(that)...but(that)...不是，而是
