I think we need experienced staff for this project.
我认为，这个项目需要有经验的员工来做。
I feel he is one of the best candidates for the job.
我认为他是做这个工作的最佳人选之一。
I believe we can recruit the staff we need.

我认为我们可以聘用我们需要的员工。

In my view，expansion is absolutely necessary.
我认为，扩展是绝对必要的。
In my opinion, expansion is asking for trouble.
依我看，扩展是自找麻烦。
As far as I'm concerned, we need expansion, but the problem is how it is going to be financed.
依我看，我们需要扩展，但问题是如何融资。