birth
词根词缀：
后缀
-th
1 表名词，通常指抽象名词，“行为，性质，状态”
2 表序数词，“第…”
eighth num. 第八
seventh num. 第七
sixth num. 第六
tenth num. 第十
数据来源：新东方英语词汇速记大全
相关例句：
She's just given birth to a baby girl
她刚生了一个女孩。
Maternity services were to be reduced in consequence of falling birth rates.
由于出生率下降，产科服务会随之削减。
In 1980, strikes at the Lenin Shipyards gave birth to the Solidarity trade union.
1980年，列宁造船厂的罢工致使团结工会得以成立。
My wife was sterilized after the birth of her fourth child.
我妻子生完第4个孩子后做了绝育手术。
She gave birth to a boy.
她养了个儿子。
Three months before birth babies are already responsive to sound.
在出生前3个月，胎儿就已经对声音有反应了。