这些病人被观察了数月之久。

The patients were observed over a period of several months.

《牛津词典》

受试者在心理学家的实验室里坐着谈话，不知道他们的眼部行为正在通过单向视觉屏幕被观察。

Subjects sit and talk in the psychologist's laboratory, innocent of the fact that their eye behavior is being observed from a one-way vision screen.

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实际上，有了定位星就更有意义了；他们可以被观察，而不是试图猜测他们何时会升起。

Actually it makes more sense with setting stars; they can be watched instead of trying to guess when they'll rise.

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We saw that the Bohr model was able to correlate the observations of Angstrom, which had been formulated by Balmer.

知道了波尔模型,可以和阿姆斯特朗的观察相吻合，这观察后来被巴尔末推导出来相证实。

麻省理工公开课 - 固态化学导论课程节选

You just got to be looking around all the time to make sure you are not going to be run down.

你随时观察四周以确保你不会被撞倒。

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Now this can actually take a while to watch but you'll see that the numbers are moving into position.

现在大家可以观察一会儿，你会发现,数字都被移动到了合适的位置。

哈佛公开课 - 计算机科学课程节选