短语 “build someone or something up” 的意思是 “对某人或事进行赞扬、宣传或吹捧”，从而积极地影响他人的看法。“Build someone up” 还可以突出表达 “赞扬某人，以提高其自信心”。
 
例句
 
Stop building up your colleague. I’ll judge her when I meet her.
别再吹捧你的同事了。等我见到她的时候，我会自作评判。
 
I built up the possibilities of the product in order to impress the investors.
为了给投资者留下深刻的印象，我夸大宣传了这个产品的前景。
 
I think we need to build Joe up a bit. His confidence is really low at the moment.
我觉得我们得给乔打打气。他现在真的很没自信。