The life expectancy at birth for males in 1998 is 77 . 4 years.
It was raining at her birth.
from then on,从那时起,一般用:”一般过去时. (请给好评哦,您的好评是对我最大的鼓励,谢谢哈.)
I was 1 kilogram when I was at birth.
whenwas born
birthpet是一个专用名词没有反义词.生肖, 属相
at birth : 出生同义词:childbirthbe born
birth[bE:W]n.出生, 产生, 出身
出生,诞生