Pocs
[医][=poly-o-chorostyrene]聚邻氯苯乙烯
🗣️ 情景例句
Well, they're babies.
嗯， 他们都是婴儿。
I'm going by air.I like flying.
我将坐飞机去，我喜欢飞行。
What happened before printing was invented?
印刷术发明以前是怎么一回事？