We each have a notion of just what kind of person we'd like to be. [+ of]

我们每人都有一个自己想成为什么样的人的想法。

I reject absolutely the notion that privatisation of our industry is now inevitable. [+ that]

我绝对不能接受我们这一产业的私有化目前已成必然的看法。

I'd had a few notions about being a journalist.

我以前曾有过想当记者的念头。