Polyisocyanate
n. [化]聚亚安酯
🗣️ 情景例句
Forgive my ignorance, But what exactly are you talking about?
请原谅我的孤陋寡闻，你说的到底是什么？
The darkest hour is that before the dawn.
黎明前是最黑暗的时刻。
Why not?
为什么不去？