The flowers died off one by one.

花儿开过就一朵接一朵地凋谢了。

They had been on our planets for millions of years, but 2018 was the year several species officially died off forever.

这几个物种已经在我们的地球上存在了数百万年，但是官方称2018年它们已经陆续灭亡。

One by one, four ministers died off.

一个接一个，4名大臣相继死去。

As she got older, her relatives died off.

随着她越来越老，她的亲戚们都相继死去了。

The members of the family had all died off.

这家人一个个都死了。