Pfbc
[医][=pentafluoro-benzyl-chloroformate]五氟苯甲基氯甲酸酯
🗣️ 情景例句
What made you decide to study Economics?
你为什么决定修读经济学？
What kind of breakfast did you have?
你吃了什么样的早餐？
He can get up for about two hours each day, but you must keep the room warm.
他每天可以起来两个小时，但您必须保持房间温暖。