n.[C]

1. 危機；緊急關頭；轉折點
   The economic crisis lasted for several years.

   經濟危機持續了好幾年。

   Something told him that this was a crisis in their lives.

   他意識到這是他們生活中的一次危機。

2. 病情危險期
   The patient has passed the crisis.

   病人已度過危險期。

3. （戲劇，小說等情節中的）關子

n.

1. a time of intense difficulty or danger.
2. the turning point of a disease when an important change takes place, indicating either recovery or death.