By 2000, the incidence and mortality rates of infectious diseases in the region had dropped by 64.79 percent and 29.91 percent respectively from 1993.是什么意思_By 2000, the incidence and mortality rates of infectious diseases in the region had dropped by 64.79 percent and 29.91 percent respectively from 1993.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句