马不停蹄without a stop

马到成功success immediately upon arrival

马革裹尸die on the battle field

马马虎虎careless，casual，fair，just so-so，not so bad

马首是瞻follow somebody’s lead

horse and food adv.全军，全力以赴地

A horse of another/different color完全另一回事

A horse of the same color同一回事

A horse on somebody对某人的嘲弄

As strong as a horse非常健壮，精力充沛

Ask a horse the/a question（赛马骑师）力求竞赛的马竭尽全力；（赛马前）试马测验其速度和持久力

A good horse is never of an ill color良马无劣色

A good horse should be seldom spurred好马无须加鞭

A short horse is soon curried矮马容易刷洗；小事易办

Never swap horse while crossing the stream

Don’t swap horses in midstream

过河中途莫换马，病重不宜换郎中。

北京大学信息管理系03级博士