Dr.Guozhengjing, the volunteer from Beijing, is investigating the nutrition and health status of the students in Guizhou tuition aid project school是什么意思_Dr.Guozhengjing, the volunteer from Beijing, is investigating the nutrition and health status of the students in Guizhou tuition aid project school在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句