我的玩 » I am playing with 分类回收垃圾 » Waste separation and recovery 1891年，德国人用对苯二酚与环氧氯丙烷反应，缩聚成树脂并用酸酐使之固化。但是它的使用价值没有被揭示。
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建议人们对垃圾进行分类，使垃圾更容易回收。
People are advised to sort their rubbish to make it easier for the waste to be recycled.
今年，城市服务部门将对垃圾进行分类回收，从而将垃圾焚烧的卡车数量减少到去年的一半。
This year city services will separate for recycling enough refuse to reduce the number of truckloads of refuse to be incinerated to half of last year's number.
垃圾分类包括四种类别：可回收物、有害垃圾、干垃圾和湿垃圾。
Garbage sorting includes four categories—recyclable, harmful, dry and wet waste.
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