qui vive

1. Lee has an extraordinary talent for qui vive watchfulness in close-ups.
   在对于特写镜头的警觉上，李安有一种非凡的天份。

n.

on the qui vive

• 密切注意着；警惕
  paying close attention to a situation, in case sth happens
  1. He's always on the qui vive for a business opportunity.
     他始终密切关注商机。

noun

1. condition of heightened watchfulness or preparation for action
   1. bombers were put on alert during the crisis

   Synonym:    alert