Prepolycondensate
预缩聚物
🗣️ 情景例句
This is terrible.
真是太糟了。
Don't trouble trouble until trouble troubles you.
不要自寻烦恼。
And it should not be forgotten how small those resources are in a poor and backward country.
不应忘记，在一个贫穷落后的国家里，那部分财力是很有限的。