有些批评家喜欢不加考虑就贬低新的想法。

Some critics love to ___run ___down new ideas without considering their merits.

不断诋毁你的同事会适得其反。

It's counterproductive to constantly ___run ___down your colleagues.

他利用一切机会诋毁他的竞争对手。

He took every opportunity to ___run his rivals ___down.