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Smith asked us to read a story and then write on it, all within 45 minutes.

史密斯让我们在45分钟内读一则故事并根据这则故事写一篇读后感。

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The antibodies were discovered in a man, known as Donor 45, whose body produced them naturally.

VOA: special.2010.07.14

Right. I would say as I reflect back on my college experiences and those listening in the audience should know, I graduated from college 45 years ago.

的确如此，可以这么说,当我回想我的大学生活的时候,想必听众中有人知道，我45年前就从大学毕业了。

普林斯顿公开课 - 人性课程节选

This, to great extent, explains why so many people today 45% experience depression the 45% figure, nationwide on college campuses.

这很好地解释了，为什么今天有那么多人,感到抑郁，达到，全国大学校园都如此。

哈佛公开课 - 幸福课课程节选