Hbeag
乙型肝炎e抗原
🗣️ 情景例句
Good morning, Mr. Zhou. Take a seat, please. What can I do for you?
早上好，周先生。请坐。有什么事吗？
It is desirable to apply to good schools.
申请好学校是令人向往的。
Certainly!
当然可以。