Polyacetylen
聚乙炔; 聚乙炔
🗣️ 情景例句
If you want my advice, I don't think you should go.
如果你想听我的建议，我认为你不应该去。
Do you know what's on tonight?
你知道今天上演什么？
Although we can't see these atoms, they really do exist.
虽然我们看不见原子，但它们的确存在。