Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
He never married because
他不结婚是因为
Did you hurt yourself?
你自己割伤的？
Sun Huilin is Chinese, Peter is Australian, Lynn is from Greece and I'm from Britain.
孙辉林是中国人，彼得是澳大利亚人，林恩是希腊人，我是英国人。