Pfbc
[医][=pentafluoro-benzyl-chloroformate]五氟苯甲基氯甲酸酯
🗣️ 情景例句
Good morning. This is Huang Feng.
早上好，我叫黄凤。
How much is the postage for this?
这个邮费要多少钱？
Very excited, the party dug a hole two feel deep.
队员们异常激动，就地挖了一个两英尺深的坑，