Vinylene
1,2-亚乙烯基, 乙烯撑, 次亚乙烯基
🗣️ 情景例句
Fine. We were just wondering about this trunk.
好啦。我们正纳闷这只大衣箱呢。
What we lose in hake we shall have in herring.
失之东隅，收之桑榆。
The price just covers the cost.
这个价格正好抵消成本。