Another special consideration in this case is that... 对这个问题的另一考虑是...
Besides,we should not neglect that... 除此之外，我们还不能忽视...
But it is a pity that... 但遗憾的是...
But the problem is not so simple,therefore... 然而问题并非如此简单，因此...
However,... 然而...
Others may find this to be ture,but I do not,I believe that... 在别人看来可能是对的，但我个人并不认为如此，我认为...
On the other hand,... 另一方面...
Perhaps you'll question why... 也许你会问为什么...
There is certain amount of truth in this,but we still have a problem... 尽管大量事实如此，但我们还有一个疑问...
Though we are in basic agreement with... 虽然基本上我们同意...
What seems to be the trouble is... 似乎困难是在...
Yet difference will be found,what is why I feel that... 然而其中仍有差别，这也正是我们为什么认为...
So long as you regard this as reasonable,you may... 只要你认为这合理，你就可以...
...should be put in the first place. ...应放在首要位置
Next,another factor we must consider is that... 接下来，我们必须考虑的另一因素是...
The main reason that can be seen by everyone is that... 每个人都注意到，最主要的原因是...
What is also with noticing is that... 另一个值得注意的是...
