Ethylethylene
丁烯-1
🗣️ 情景例句
They don't have room service at Old Country Inn. Old Country Inn
没有房间服务部。
Custom without reason is but ancient error.
习俗没有道理，古代谬误而已。
They were visited by a large colony of ants which obtained a sort of honey from them.
蚜虫遭到一窝蚂蚁的攻击，蚂蚁从它们身上可以获得一种蜜。