after they were born 和 when they were born

问题描述:

after they were born 和 when they were born

不一样
after:他们出生后
when:他们出生时

前面是“他们出生后”
后面是“当他们出生时”
时态不一样

看你怎么用了,就从这句上来看,一个是之后,一个是在他们出生的时候

在他们出生之后
当他们出生