pass away all of a sudden ? 那位科學家早上～了，他昨天下午還做了一次長篇報告。In the morning the scientist passed away all of a sudden. He gave a long lecture yesterday afternoon.
溘然長逝kè rán chánɡ shì
溘：忽然。人突然死亡。die suddenly, pass away all of a sudden, pass away suddenly, breath one’s last