雲泥の差 の意味 | Babel Free

定義

"the difference between clouds and mud": as different as night and day; a great difference when compared with the same scale, one being far better than the other

例文

“今まで物理学校で毎日先生先生と呼びつけていたが、先生と呼ぶのと、呼ばれるのは雲泥の差だ。”

Up to now, in Physics School, I'd called out "professor, professor!" every day, but calling someone "professor" and being called "professor" myself was as different as clouds and mud.

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