当机立断

shì qing jǐn jí bì xū dāng jī lì duàn

事情紧急，必须当机立断。

The circumstances call for a prompt decision.

zhè zhǒng qíng kuàng xū yào wǒ men dāng jī lì duàn

这种情况需要我们当机立断。

The circumstances call for an speedy decision.

qíng kuàng shí fēn jǐn jí wǒ men yīng dāng dāng jī lì duàn

情况十分紧急，我们应当当机立断！

In this crisis, we've got to make a quick decision.

jǐng chá bì xū yào dāng jī lì duàn

警察必须要当机立断。

Police officers often have to make snap decisions on how to act.