come down to earth 腳踏實地、做事實際
說明：
come down to earth 即回到地球來。也可寫成 be down to earth。如果是後者，down to earth 是 prepositional phrase，當形容詞用。動詞用 ve。
例子：
Come down to earth, Frank! Forget your fantasy. Susan will not marry you.
Tom is down to earth. Indeed, he is a miser.
by Thomas Shum