smell blood
察觉到弱点或机会，并采取行动以获利或取胜
口语·形容乘胜追击
英文释义
to sense weakness, vulnerability, or an opportunity to achieve victory or success
例句
The team smelled blood after the opponent's star player got injured.
典故来源
源自狩猎或战斗场景，动物闻到血腥味即知对手虚弱，引申为抓住机会。