Dienes
[化] 雙烯; 二烯烴
??? 情景例句
Can I help with anything?
我能幫什么忙嗎
I ask him to do the dishes right now.
我要求他立刻洗碗碟。
After you printed the book, you had to throw away the carved pieces of wood.
你把書印出后，不得不把刻過的一片片木板扔掉。