非法交易

• unlawful trading
• illegal transaction
• trafficking in illegal goods

例句

1. 他在搞非法交易不断榨取公司的利润。
   His illegal deal is steadily milking the profit from the business.
2. 英国政府中保护消费者以免遭不公平或非法交易伤害的一个部门。
   British government department which protect consumer against unfair or illegal business.