1. They dammed up the river to make a lake for their water supply. �����������ӣ��γɺ�����ˮ��
2. Three Gorges Dam:Another wonder on the Earth. ��Ͽ��ӣ���������һ����۵�����
3. Safety monitoring results of a dam with clay core are presented. ������ij�����ǽɰ��ʯ�ӵİ�ȫ���ɹ���
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n.
1. a barrier constructed to contain the flow of water or to keep out the sea
2. a metric unit of length equal to ten meters
3. female parent of an animal especially domestic livestock v.
1. obstruct with, or as if with, a dam
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