Polyacetylene
聚乙炔
🗣️ 情景例句
it's in the cabinet with the salt and pepper.
应该跟盐和胡椒一起放在橱柜 。
One fool makes many.
一人傻，傻大家。
Duck your head as you go through the door there.
经过那儿的门时，请将头放低。