Zedeflon
四氟乙烯均聚物
🗣️ 情景例句
No, that's not right. Most of the time I do those things.
不对。那些事多数情况是我来做。
Do you like horse?
你喜欢马？
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？