sale by authority of law

例句：

1. 1.The company's decision to sell its patented technology was a legal sale.
   该公司决定出售其专利技术是一次合法的销售。
2. 2.The government has authorized a sale of weapons in the region.
   政府已经授权在该地区出售武器。
3. 3. The sale was conducted by an authorized representative.
   这次销售由一位被授权的代表进行的。