Once long ago he had considered becoming a state trooper.

很久以前他曾考虑过当一名州警官。

《柯林斯英汉双解大词典》

We met once long ago.

我们从前碰到过一次。

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Once long-term data has been stored into the PWH tables, you can use the predefined ROT or define your own ROT to analyse the data in the PWH.

一旦长期数据存入 PWH 表，就可以使用预定义的 ROT 或定义自己的 ROT 来分析 PWH 中的数据。

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Parson Walker's wife was very sick once, for a long time, and it seemed as if they were not going to save her.

VOA: special.2009.08.29

So really, once we start writing more interesting programs, you would have to type out long annoying commands like that to just compile more sophisticated programs.

实际上，一旦我们开始写一些更复杂的程序时，你们可能要键入那样一些长的，讨厌的命令,来编译跟高级的程序。

哈佛公开课 - 计算机科学课程节选

Never go back. Find another. Leave at once. Go for a long trip again, but this time we'll go wherever I want, won't we?" I nodded. My Lolita.

绝不会去，另找一所学校，马上走，再去长途旅行，不过这次去我想去的地方，好吗？“我点头，我的洛丽塔。

耶鲁公开课 - 1945年后的美国小说课程节选

That is that once long term unemployment exists it is extremely difficult to get rid of.

FORBES: Why America's Unemployment Problem Is Becoming More Like The European Problem

Once a long-stay visa is secured for one country, short-stay rights apply to all.

ECONOMIST: Visas in Europe

Woods backed off putts three times, once glaring long and hard at an offender in the crowd.

CNN: ASIANOW - TIME Asia | Mobile Phones Frustrate Razor Sharp Tiger Woods