在工业上，激光被用来作为锯和钻头，而且它永远不会变钝。

In industry, lasers are the saws and drills that never get dull.

youdao

在工业上，激光被用来作为锯和钻头，而且它永远不会变钝。

In industry, lasers are the saws and drills that never get dull.

youdao