Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
at ten o'clock tomorrow morning.
明天上午十点钟。
What's been the consumer reaction to your product?
消费者对你们的产品有过什么反映？
Advertisers discovered years ago that all of us love to get something for nothing.
做广告的人们多年前就发现我们大家都喜欢免费得到东西。