Definition: Waste material is no longer needed and can be got rid of. Level: B1
回收废纸有助于减少环境污染。
Recycling ___waste paper helps reduce environmental pollution.
妥善处理废料对公共健康至关重要。
Proper disposal of ___waste materials is essential for public health.
这家工厂将废木材转化为可再生能源。
The factory converts ___waste wood into renewable energy.
