Pfbc
[医][=pentafluoro-benzyl-chloroformate]五氟苯甲基氯甲酸酯
🗣️ 情景例句
You can see many posters that are put up before the movie opens.
每部电影首映前你都会看到铺天盖地的海报。
Tea, please.
我喝点茶吧。
We need it in our office by next Monday.
下星期一以前要送到我们公司。