"Look before you leap" is a warning against people acting rashly.

“三思而后行”这条谚语是告诫人们不要鲁莽行事。

youdao

I can't imagine their acting so rashly.

我不能想象，他们会这样贸然行事。

youdao

Iraq took much of the allotted 90 minutes of the debate, with Bush defending his decision to order U.S. troops into Iraq, and Kerry accusing Bush of acting rashly without doing enough to gain support from the international community.

CNN: Bush, Kerry: Nukes?most serious threat