Polyacetylene
聚乙炔
🗣️ 情景例句
Haven't we met before?
我们没见过吗？
People greet one another with Happy New Year.
人们相互祝福“新年好”。
As a result, the fish just eat and eat and grow and grow in the lovely warm water.
结果是，这些鱼就在可爱的温暖的水流中吃呀吃，长呀长。