Heptene
[化] 庚烯
🗣️ 情景例句
Could you give me some information on your European tours?
你可以给我一些你们经办的有关欧洲旅行的资料吗？
Today is May 21st.
今天是五月二十一号。
So he took off the second shoe and put it under his bed very quietly.
他脱下第二只鞋子，轻轻地放在床下边。