Polyepoxide
聚环氧化物
🗣️ 情景例句
I'm delighted to make your acquaintance.
认识你我觉得非常高兴。
Have you ever thought about becoming a professional musician?
你曾经想过要成为职业音乐家吗？
No one discovers a rarity by chance.
无论是谁都不会一下子就发现一件珍品。