Acetylfluoride
乙酰氟
🗣️ 情景例句
Are you going to return it here?
你要在这里归还吗？
Don't forget to write to let us know you arrived safely.
不要忘记写信回来，告诉我们你已经安全抵达。
Did he say what it was about?
他讲了什么事吗？