Diethylidene
[化] 二亚乙基; 2-丁烯
🗣️ 情景例句
Me?
我？
Hoist your sail when the wind is fair.
随机应变。
After taking off, we were flying low over the city and slowly gaining height,
起飞之后，我们在城市上空低低地飞行，然后慢慢爬高。