n.[C]

1. 危机；紧急关头；转折点
   The economic crisis lasted for several years.

   经济危机持续了好几年。

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

   他意识到这是他们生活中的一次危机。

2. 病情危险期
   The patient has passed the crisis.

   病人已渡过危险期。

3. （戏剧、小说等情节中的）关子

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.