Polyacetylene
聚乙炔
🗣️ 情景例句
I heard a lot of shouting, what's up?
我听见很多喊声，出了什么事了？
One penny witgh right is better than a thousand without right.
合法得来一个钱，胜过非法钱一千。
but few of us have skeletons in the cupboard.
但我们当中极少有人有柜中骷髅。