是怎么发生的

how it happened

→ 是
phrase Rare #30,826
how it happened Used to ask or explain how an event occurred.
CH: 这件事是怎么发生的?
EN: How did this happen?

如果我们进行了全面的调查仍然无法理解这件事是怎么发生的

If we conduct a thorough investigation and still can’t understand how this happened.

— 坠落的审判 (2023)

我真的不明白这一切到底是怎么发生的

I really don’t understand how any of this happened.

— Suzhou River (2000)

他解释事故是怎么发生的。

He explained how the accident happened.

"我想记起这一切到底是怎么发生的"

I want to remember how it all happened.

— 潜水钟与蝴蝶 (2007)