Their concern is that the high number of HIV and TB carriers in Southern Africa, makes it an environment ripe for the rapid spread of XDR TB.是什么意思_Their concern is that the high number of HIV and TB carriers in Southern Africa, makes it an environment ripe for the rapid spread of XDR TB.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句