这家旅行社不过是毒品交易的掩护场所。

The travel company is just a front for drug trafficking.

《牛津词典》

他经营了一家建筑公司，作为毒品交易的掩护。

He ran a construction company as a cover for drug dealing.

《柯林斯英汉双解大词典》

他那时肆无忌惮地在监狱里经营着每个月$400000的毒品交易。

He was brazenly running a $400,000-a-month drug operation from the prison.

《柯林斯英汉双解大词典》

他那时肆无忌惮地在监狱里经营着每个月$400000的毒品交易。

He was brazenly running a $400,000-a-month drug operation from the prison.

《柯林斯英汉双解大词典》