Pentaene
[化] 五烯
🗣️ 情景例句
They come back here for lunch,
他们回到这儿来吃午餐，
Pigs may fly,but they are very unlikely birds.
猪儿纵会飞，终究不是鸟。
Unfortunately you'll have to pay the fine before you check those books out.
在你借书之前你要先付清罚款。