“生意伙伴”常见的英文表达是 “business partner” 。
例句：
We are business partners and have cooperated on many projects.（我们是生意伙伴，在许多项目上都有过合作。）
I'm glad to have found such a reliable business partner.（很高兴能找到这样一位可靠的生意伙伴。）