Correct

当机立断

/ dāng jī lì duàn /
Strokes

Definition

to make prompt decisions (idiom)

Example

Definition

make a prompt decision; make a quick decision equal to the occasion; be decisive

1
Shìqing
事情
jǐn
紧迫
  
,
必须
dāngduàn
当机立断
  

The circumstances call for a prompt decision. / This is urgent and we must make a quick decision about it.