keep 保持，ground 地面，keep your feet on the ground字面意思：保持你的脚在地面上，引申为：脚踏实地。

【例句】
It's a very exciting time for the business but it's important that we keep our feet on the ground.
现在对我们的生意来讲是激动人心的时候，但是脚踏实地依然很重要。

Get Up on the Right Side, Keep Your Feet on the Ground, Try Your Utmost to Realise Your Dreams!
端正态度脚踏实地，全力以赴去实现自己的梦想！