Polycyclopentadiene
聚环戊二烯
🗣️ 情景例句
our talks about custom-designed dresses for the boutique?
我们曾经谈过为时装店设计订做的服装吗?
What would you like to eat?
你要吃些什么？
In summer it is often too hot, and in winter it is too cold.
夏天常常太热，冬天又常常太冷。