They gone through an existential crisis.

他们经历了一场生存危机。

In a state with a tradition of boosterism it has caused something of an existential crisis.

而在历来被称作“美国经济助推器”的内华达州,这却引发了一场生存危机.

Facing what feels like an existential crisis, Facebook is getting out a new public mission statement that focuses on improving the world by building communities and bringing people closer together.

脸书似乎正面临着生存危机，它发表了一份公共使命宣言，试图通过建立社区和拉近人们之间的关系来改善社会。