1. Heavy metal pollution des sevious harm to plant growth and development, crop yields and qualities, and does sevious harm to human and environment by the bio-megascopic effect of biochains. �ؽ�����Ⱦ����Ӱ��ֲ�������������Ӱ������IJ�����Ʒ�ʣ���ͨ���������Ŵ����ý�һ��������ͻ����������Σ��������ؽ�����Ⱦ�ѳ�Ϊ�����Ե��ش����⡣
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adj.
1. visible to the naked eye (especially of rocks and anatomical features)