这个单词你近期已经查过5次了，小D建议你将它收录到单词本。收录 / 忽略

birthrate ['bə:θreit]

n. 出生率

the ratio of live births in an area to the population of that area; expressed per 1000 population per year
[同] fertility, fertility rate, birth rate, birthrate, natality

　以下网页可能有助于你对本词条的理解：

生育高峰有很多种表达如“spike in birthrate / spike in the number of babies born / peak in the birthrate / baby boom。查看全文
　　45.A decreasing birthrate may lead to unemployment because it results in a declining market for manufactured goods查看全文

　　　 more...

单词量 SuperStar