birthrate 的英语意思
birthratebirthrate /ˈbɜːθreɪt $ ˈbɜːrθ-/ noun [countable] 
查看全部语言翻译 the number of births for every 100 or every 1,000 people in a particular year in a particular place某地某年每100人或每1000人中的出生人数: 
the rising birthrate不断上升的出生率
查看全部语言翻译 the number of births for every 100 or every 1,000 people in a particular year in a particular place某地某年每100人或每1000人中的出生人数: the rising birthrate不断上升的出生率