The annual vaccine purchasing efforts by the DOH for seasonal flu as well as for outbreaks like bird flu and now H1N1 are a true headache.是什么意思_The annual vaccine purchasing efforts by the DOH for seasonal flu as well as for outbreaks like bird flu and now H1N1 are a true headache.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句