underpromise and overdeliver

The best client strategy is to underpromise and overdeliver every single time.最佳的客户策略是每次都少承诺多兑现。

He built his reputation by consistently underpromising and overdelivering on every project.他通过在每个项目上始终如一地少承诺多兑现建立了自己的声誉。