Oral Polio vaccine is available, for eligible University Health Service users, in the Treatment Room of UHS, HKU and is free of charge.是什么意思_Oral Polio vaccine is available, for eligible University Health Service users, in the Treatment Room of UHS, HKU and is free of charge.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句