Polyacetylene
聚乙炔
🗣️ 情景例句
Don't get so excited about it.
别因为这事儿太激动。
And I got it on sale.
我在大减价时买的。
I also need your permission to speak to the family lawyer about this matter.
我还需要你的许可，就关于这件事跟你们的家庭律师谈话。