classify the garbage 对垃圾进行分类
There will still be lots of challenges if we are to classify garbage in a short time.
如果我们要在短时间内对垃圾进行分类，仍然会有很多挑战。
From October last year to this March, Wang and her group went door by door in the community to teach residents how to classify garbage.
从去年10月到今年3月，王凤琴和她的志愿者们在小区里挨家挨户地敲门，宣传垃圾分类知识。
你会将垃圾分类放置吗？
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