The use of manure and composts as fertilizers is probably almost as old as agriculture.
粪肥和混合肥料的使用几乎与农业同样古老。
Secondly, coarse composts should be separated by airflow density separation system.
其次是应用气流密度分选系统对粗堆肥进行精分选。
This lamppost composts trash and uses the methane byproduct as a fuel to power the lamps.
这灯柱堆肥垃圾和使用甲烷作为燃料的副产品权力的灯。
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