a breath of fresh air
US /ə brɛθ əv frɛʃ ɛr/
UK /ə brɛθ əv frɛʃ ɛr/

1.
新鮮な空気, 新しく歓迎すべきもの
someone or something that is new, refreshing, and welcome because it is different from what has been there before
:
•
Her innovative ideas were a breath of fresh air in the stagnant company.
彼女の革新的なアイデアは、停滞した会社にとって新鮮な空気だった。
•
After all the serious discussions, his humor was a breath of fresh air.
真剣な議論の後、彼のユーモアは新鮮な空気だった。