Vinylene
1,2-亚乙烯基, 乙烯撑, 次亚乙烯基
🗣️ 情景例句
They're still open?
他们现在还开着吗？
From which station does the train leave?
这列火车从哪个站开出呢？
and beyond six or seven they are worthless.
如果超过六七天，天气预报就没有了任何价值。