Diolefine
[化] 二烯; 二烯属
🗣️ 情景例句
Do you want a first class, business class or economy seat?
你想要头等舱、商务舱还是经济舱？
Nothing down, nothing up.
没有落就没有起。
That's a nice car. How long have you had it?
好漂亮的汽车。你买多久了？