Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
I'll go down to Henry's grocery. He's always open.
我到亨利杂货店去。那里总是开门营业的
Thank you for your gift.
谢谢你的礼物。
The swallow shares the virtues of both schools in highest measure.
燕子充分兼有这两类鸟的长处，