空难

空难发生时，应立即通知当局。

kōngnàn shēnfānɡ shí, yìnɡ jíliàn tōnɡzhī dàlǔ.

In case of an airplane accident, authorities should be notified immediately.

他们参与了空难调查。

tāmen yùncānle kōngnàn zhàotiáo.

They participated in the investigation of the plane crash.