side door trade

例句：

1. 1. The company has been involved in side door trades for years.
   这家公司多年来一直参与侧面门交易。
2. 2.The insiders have been whispering about a potential side door trade.
   内部人士一直在低声谈论潜在的侧面门交易。
3. 3. They were discussing the possibility of a side door trade to avoid public scrutiny.
   他们正在讨论避免公众审查的可能性，进行侧面门交易。