合则两利，斗则俱伤【英】

both gain from peaceful coexistence; and lose from conflicts

译文来源

http://china.usc.edu/prc-premier-wen-jiabao-%E2%80%9Cbuild-past-achievements-and-work-together-even-better-china-us-relationship%E2%80%9D

例句

1. 一是中美两国合则两利，斗则俱伤；——《继往开来，共创中美关系更加美好的明天》

1. First, China and the United States both gain from peaceful coexistence, and lose from conflicts.—Quoted from Build on Past Achievements and Work Together For an Even Better China-U.S. Relationship