People from different classes used to mix very little.
不同阶层的人过去很少交往。
There are 24 contestants coming from different classes . All of them are excellent. I hope they can get good grades in today 's competition .
相信你们都很优秀，希望大家能在今天的比赛中取得优异的成绩。
If multiple agents are used, they should be from different classes.
如果所用药剂不止一种，则它们应是属于不同类别的药物。
Representatives from different classes and different societies provided different solutions.
不同阶级和不同社会的代表给出了不同的答案。
Representatives from different classes and different societies provided different solutions.
不同阶级和不同社会的代表给出了不同的答案。
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