Perfluoroallene
[化] 全氟丙二烯
🗣️ 情景例句
Yes, what can I do for you?
是的，我能为您效劳吗？
Things unreasonable are never durable.
不合理的事不会持久。
The girl asked to see a timetable, feeling sure that her father could not have made such a mistake.
姑娘要求看到时刻表，因为她相信父亲不能把这么大的事弄错。