1：From my point of view, it is more reasonable to support the first opinion rather than the second.(在我看来，支持第一种观点比第二种更有道理)
2：I cannot entirely agree with the idea that……(我无法完全同意这一观点)
3：As far as I am concerned/In my opinion,……(就我来说……)
4：I sincerely believe that……==I am greatly convinced (that)子句.(我真诚地相信……)
5：Finally, to speak frankly, there is also a more practical reason why ……(最后，坦率地说，还有另外一个实际的原因……)