birthrate是什么意思_birthrate怎么读_音标'bɜ:θˌreɪt
时间:
birthrate是什么意思音标:英 ['bɜ:θˌreɪt]美 ['bɜ:θˌreɪt]
n. 出生率
n. the ratio of pve births in an area to the population of that area; expressed per 1000 population per year
birthrate的用法和例句:
1.As birthrates fell, they made things worse.
出生率下降 他们却火上浇油