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……）