soft copper的用法和样例：
例句
- Resist the temptation to remove all of the black spots by hard scrubbing or by flexing the soft copper.
抵制诱惑，删除所有的黑点很难擦洗或伸缩软铜。 - With his bow drill, the workman bores small cavities for brads of soft copper to be hammered in, binding the pieces.
他要用弓钻现在上面打几个小孔，然后软铜做成的曲头钉穿在里面好把碎片绑在一起。
