當機立斷

当机立断
dāngduàn
to make prompt decisions (idiom)

CEDICT

  1. (literally) of an electronic device: crashed and immediately disconnected
  2. of an electronic device: crashed and immediately disconnected
  3. to be decisive and make a decision promptly at a critical moment

Wiktionary

抓住時機立刻作出決斷:「村長風雨交加水位上升當機立斷村民趕快撤離。」應機立斷」。

重編國語辭典

當下立刻作出決斷毫不遲疑

維基詞典

Entry Composition