as the saying goes可以用在口语。

中文意思是“俗话说”

例如,他最近因为学习成绩很难提高上去。老师鼓励他说,“俗话说,多一份付出才会多一份收获。”

He is having a hard time improving his grades recently. The teacher encouraged him to say, "As the saying goes, the more you pay, the more you get."