Methylvinyl
甲乙烯
??? 情景例句
He'll be back soon.
他很快就回來。
Better lose a jest than a friend.
寧可不說一句俏皮話，以免得罪朋友們。
Then I arrived home at six o'clock yesterday evening. He telephoned again.But I didn't answer the phone!
后來，我昨晚6點鐘回到家里。他又打來電話，但我沒接。