Card with information write on it, used to classify information into the correct order.
写有信息的卡片，用它来将信息分类使之有序。
I classify the rubbish into different types everyday.
我每天将垃圾分类。
It is very useful to classify demand factors into these categories.
将需求因素加以归类非常实用。
It is very useful to classify demand factors into these categories.
它是将需求因素加以非常有用。
It is very useful to classify demand factors into these categories.
它是将需求因素加以非常有用。
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