The incidence and mortality of measles for Chinese children had dropped by 98.1 percent and 99 percent,respectively,from the figures for 1978.是什么意思_The incidence and mortality of measles for Chinese children had dropped by 98.1 percent and 99 percent,respectively,from the figures for 1978.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句