Some scientists are trying to find out the 原因 for the haze weather原因cause 加不加s 不懂别回

分类: 作业答案 • 2022-01-02 15:50:35

问题描述：

Some scientists are trying to find out the 原因 for the haze weather
原因cause 加不加s 不懂别回

答

既可加s,也可不加s.加s表示多种原因,不加s表示一种原因.