试题题干
The beauty of lasers is that they can do machining without ever physically touching the material.
参考答案
正确答案：
试题解析
beauty n.美， 此处应为妙处、好处； laser n.激光；physically touching 接触加工。
The beauty of lasers is that they can do machining without ever physically touching the material.
beauty n.美， 此处应为妙处、好处； laser n.激光；physically touching 接触加工。