1.A case in point is ... 一个典型的例子是... 

   　 2.However, 然而…

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

　　4 .But it's a pity that... 但遗憾的是… it’s a pity that….遗憾的是。。。

 　   5 In spite of the fact that...尽管事实...... In spite of 尽管

 　   6 .Further, we hold opinion that... 此外，我们坚持认为，... 

　　7 .However , the difficulty lies in..+名词或者动名词 .然而，困难在于…

 　   8.Similarly, we should pay attention to... 同样，我们要注意... 

　　9 As it has been mentioned above...正如上面所提到的… (可以用来对前面所说的话进行补充说明) 

　　10.In this respect, 从这个角度上