The death rate of the Chinese population decreased from 33 per thousand before 1949 to 6.46 per thousand in 1999.是什么意思_The death rate of the Chinese population decreased from 33 per thousand before 1949 to 6.46 per thousand in 1999.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句