Prepolycondensate
预缩聚物
🗣️ 情景例句
You must observe these simple rules.
你必须遵守这些简单的规定。
I will be getting married in July.
我将在七月份结婚。
It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.
据估计，在英国蜘蛛一年里所消灭昆虫的重量超过这个国家人口的总重量。