Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
So I know.
所以我了解这些。
A clear conscience laughs at false accusations.
白日不做亏心事，夜半敲门心不惊。
If a shop assistant told him she had not heard of it, he would pretend to be considerably put out.
要是女售货员告诉他从未听说过这些东西，他会装出十分遗憾和不安的样子。