If I've said it once, I've said it a hundred times.

这事我曾经说过，而且是说过很多次了。

《牛津词典》

A scientist once said: "I have concluded that the earth is being visited by intelligently controlled vehicles from outer space."

一位科学家曾经说过：“我已经得出结论，来自外太空的智能控制飞行器正在访问地球。”

youdao

A headache specialist once said, "Masking symptoms is not the best way of treatment."

一位头痛专家曾经说过：“掩盖症状并不是最好的治疗方法。”

youdao

Women who said they were physically active even once a week showed less cognitive impairment as measured by a test.

VOA: special.2010.07.07

A famous mathematician once said "Every question must have a correct answer " for every question one answer."

一位著名的数学家曾说过,“每一个问题都必定有一个正确的答案,每一个人们所回答的问题“

耶鲁公开课 - 政治哲学导论课程节选

Yeats once said that he wanted the natural words in the natural order, but he had a very highly cultured sense of what is natural, and his poetry is full of verbal archaism.

叶芝曾说他想让自然的话语,用自然的方式呈现，但对于,自然的定义他又将其高度文化化，他的诗歌有很多口语的古语表达。

耶鲁公开课 - 现代诗歌课程节选

As a friend once said to me, because we are dual-natured, the best we can do is to lean toward the light.

FORBES: Turning Gender-War-Swords into Ploughshares

As many a wise woman once said, dating the intern three cubicles over is never a good idea.

FORBES: Looking For Love At Work? Try Bartending

As the calendar turns to March and April, Louisville players attempt to swear off convenient restaurants like McDonald's and Qdoba, and visits to Waffle House drop from "two or three times a week" to once a month, said Louisville walk-on Jordan Bond.

WSJ: Louisville: Winning With a Helping of Grease and Sugar��NCAA Tournament