Halopolymer
卤代聚合物
🗣️ 情景例句
The guests are waiting.
客人们正等着呢。
Would you please make my reservation to Chicago for tomorrow?
请帮我预订明天去芝加哥的座位好吗？
He did not know from which part of Africa his ancestor had come.
他不知道祖先来自非洲的什么地方。