你有多少次曾听到你的母亲或父亲像个孩子那样说“我努力工作给你买了/做了/加热了这些食物，你最好给我吃掉！”

How many times did you hear your mom or dad say as a kid “I worked hard to buy/make/microwave this food and you better eat it!”

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有两次她曾透过墙上的一个裂缝偷窥了他。

On two occasions she had peeked at him through a crack in the wall.

《柯林斯英汉双解大词典》

碰巧的是，我有一次发现自己曾处于类似的境地。

Coincidentally, I had once found myself in a similar situation.

《柯林斯英汉双解大词典》

I don't know if this is your experience because you've been over to Israel several times.

不知道这是不是你的经历,因为你曾去过以色列好几次。

普林斯顿公开课 - 人性课程节选

In fact, this is an argument that's been made a number of times, and I think there's a lot of sense to it -the last eight lines of Lycidas are written in a very specific line form the Italian scheme of the ottava rima.

这是一个的确曾被无数次提到的观点，并且我也认为这个观点确实有一定道理,利西达斯的最后8行是以一种非常特殊的体裁写的,即意大利式的八行诗。

耶鲁公开课 - 弥尔顿课程节选

They were the same people who were always trying to annex Cuba; about four times over they tried to annex Cuba, and it's still a bit of mystery how it never happened.

他们与妄图吞并古巴的是同一伙人,他们曾四次试图吞并古巴,这个阴谋最终因何没有得逞倒是个谜

耶鲁公开课 - 美国内战与重建课程节选