Pneumocin
肺炎球菌素, 肺炎克氏杆菌素
🗣️ 情景例句
You have to ask for my father's permission.
你必须征得我父亲的同意。
Next week I must start my term paper for Poli Sci.
到下周，我必须着手写政治学的期末论文了。
I think we are the first people here for hundreds of years. Maybe thousands.
“我认为几百年，可能几千年以来，我们是第一次来这里的人。”