名词
中文翻译：次级铜
同义词：
['secondary metal', 'secondary copper ore例句：1. The new alloy has a higher strength and better wear resistance than the traditional alloy.（这种新型合金的强度更高，耐磨性更好。）']
例句：
-
1. The new alloy has a higher strength and better wear resistance than the traditional alloy.
这种新型合金的强度更高，耐磨性更好。
-
2.The secondary copper ore is mined from the riverbed.
副铜矿是从河床中开采出来的。
-
3. The mining of secondary copper ore requires special equipment and skilled workers.
开采副铜矿需要特殊的设备和熟练工人。