Polypropene
n. 聚丙烯
🗣️ 情景例句
Oh, Grandpa!
啊，爷爷！
All things are easy that are done willingly.
做事乐意，诸事容易。
There are one hundred thousand million stars in our own Milky Way alone,
仅我们的银河系就有1000亿颗恒星，