We made some hats out of the waste materials.
我们用这些废材料制成了帽子。
All these waste materials can sell for money.
这些废品可以换钱。
The waste materials were dumped into the deep pit.
这些废料被倾倒进这个深坑。
We don't know how to deal with the waste materials.
我们不知道该如何处理这些废料。
Most waste materials, however, are disposed of simply by placing them somewhere.
然而大部分废旧材料，只是堆放在某个地方了事。
Waste materials such as glass paper and metal can be recycled.
像玻璃，纸，金属等废弃物可以再回收。
Waste materials such as glass, paper, and metal can be recycled.
像玻璃，纸，金属等废弃物可以再回收。
Waste materials such as glass, paper, and metal can be recycled.
像玻璃，纸，金属等废弃物可以再回收。
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