down to earth和down-to-earth的区别是两者都为形容词，意为“实际的”，前者常用作表语，即be动词，系表动词之后，后者常作定语来修饰名词。
拓展资料
down to earth
1、Gloria is probably the most down to earth person I've ever met.
格洛丽亚也许是我见过的最脚踏实地的人了。
2、I was shocked, brought down to earth by this revelation.
真相的披露让我深感震惊，我被带回了现实。
3、Company bosses have come back down to earth with a bump after a period of post-、election euphoria.
公司老板们在经历了一段选举过后的兴奋之后，重又回到现实中来。
4、After the euphoria of yesterday's celebrations, the country will come down to earth today.
经过昨天热烈的庆祝之后，这个国家今天将会回到现实中来。
5、Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth.
要不是重力使箭落向地面，它们将永远以直线往前飞行。
down-to-earth
1、I like your down-to-earth and hardworking spirit.
我就喜欢你们这股扎扎实实埋头苦干的劲儿。
2、On balance, the book is a friendly, down-to-earth introduction to physics.
总而言之，这是一本通俗而务实的物理入门书。
3、Now I think she no longer indulges in fancies and has become more down-to-earth.
现在我觉得她不再沉溺于幻想，已变得更注重实际了。
4、Kim wants to marry someone who is down-to-earth.
想和一个现实的人结婚。
5、Country music tells down-to-earth stories about love and life's hardships.
乡村音乐传述着真实不加渲染的爱情故事和生活中的艰难。