我们不要在没讨论的情况下就否决这个想法。

Let's not ___dismiss the idea without discussing it.

董事会决定不再进一步讨论就直接否决了他的建议。

The board decided to ___dismiss his suggestion without further debate.

这就是为什么我会拒绝考虑这个提议：学校已经有一个类似的设施很少被使用。

That is why I would ___dismiss this proposal: there's already a similar facility that's rarely used.