Polyacetylen
聚乙炔; 聚乙炔
🗣️ 情景例句
My wife Marilyn, my father and mother,
我太太Marilyn， 我父亲和母亲，
Let me direct that question to the manager.
让我直接问经理好了。
It's nice and warm out here.
这外面挺暖和。