unlawful trade

例句：

1. 1.The law prohibits the sale of illegal drugs.
   法律禁止销售非法药物。
2. 2.He was found guilty of unlawful conduct.
   他因不法行为被定罪。
3. 3.The company is accused of unlawful practices in its operations.
   该公司因其运营中的不法行为而受到指控。