当她第一次看到灯光时，马正爬上一段山路。

The horses were climbing up a hilly piece of road when she first caught sight of a light.

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2013年12月底，他制作了一段视频，这是他第一次体验防止电动汽车被盗。

In late December 2013, a video created by him was his first experience to prevent electric motorcar from being stolen.

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他是个十几岁的人了，带着这个年龄段特有叛逆和暴脾气，但是，我倒愿意这样认为，总的来说，如果有必要，亨利会再做一次。

He is a teenager, with the rebellions and feistiness characteristic of that age, but I like to think that, on balance, Henry would do it again if he had to.

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But it's only an effective vaccine in the context where you have people who can go to the doctor's office, or to an urgent care, some kind of medical facility, three times, reliably, at a specified period of time.

但为了保证接种效果,人们必须亲自去诊疗室,或者在急诊室里,使用一些医学设施辅助接种,还需要接种三次,它只在一段时间内有效

耶鲁公开课 - 生物医学工程探索课程节选