有了这个系统，学校就可以知道哪里需要更多垃圾箱，知道一学年当中垃圾是如何变化的。
With this system the school learned where it needed more trash and recycling bins, as well as how the flow of garbage changed over the academic year.
有了这个系统，学校就可以知道哪里需要更多垃圾箱，知道一学年当中垃圾是如何变化的。
With this system the school learned where it needed more trash and recycling bins, as well as how the flow of garbage changed over the academic year.
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