Prepolycondensate
预缩聚物
🗣️ 情景例句
Everyone is goofing around.
人人都在混时间。
Would you care to answer my question on the warranty?
你可以回答我有关保证的问题吗？
Otherwise we won't be able to hear ourselves talk.
否则我们的谈话彼此就都听不到了。