Prepolycondensate
预缩聚物
🗣️ 情景例句
I was expecting him here at five forty-five.
我们约好了五点四十五在这里会面的。
The sanitary engineer collects garbage.
卫生队员收集垃圾。
What does Christmas mean? Christmas Day is the birthday of Jesus Christ.
圣诞节是什么意思？圣诞节就是耶稣基督诞生的日子。