Simultaneously,Cu is a heavy metal element which is relatively easy to exceed standard,so before the sludge using in agriculture we must take certain measures to reduce excessive levels of heavy metals o its activeness.
同时Cu元素也是一种比较容易超标的重金属元素,污泥在农用之前必须采取一定措施使超标重金属的含量降低或者使其活性降低。
参考来源 - 不同菌种对污泥生物淋滤过程中重金属去除效果的比较研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Therefore, his subjectivity is the dialectical unity of purpose, activeness and limitation.
因此他的主体性是目的性、主动性和受动性的辩证统一。
Sulfur recycle catalyst activeness decline reason and its preventive measures are analyzed.
分析了硫磺回收催化剂活性衰退的原因及防止措施。
Early art education is one of the training means with uniqueness of activeness and imagination.
早期美术教育是保持活泼、富于创造性想象力的训练方式之一。
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