Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
Why don't you want to play?
你为什么不玩？
She had to keep out of sight when her husband was holding a meet.
她在丈夫举行会议时只得避不露面。
The nomads who made these markings lived by hunting and fishing during the last Ice Age which began about 35,000 B.C.and ended about 10,000 B.C.
这些痕迹是游牧人留下的，他们生活在从公元前约35，000年到公元前10，000年的冰川期的末期，以狩猎、捕鱼为生。