Perfluoropropane
[机] 八氟丙烷
🗣️ 情景例句
You must be joking.
你肯定是在看玩笑。
A book is the same today as it always was and it will never change.
一本好书今天如此，将来也如此，永不改变。
Not realizing who she was, the assistant was eager to serve her this time.
那个售货员没有认出她是谁，这一回接待她的态度非常殷勤。