Business was so good that a five thousand dollar investment in the cattle industry could make forty-five thousand dollars in four years.

VOA: special.2010.03.18

So this is what he asked them to do: Select four answers to the question 'What should a reader be to be a good reader?' "The reader should belong to a book club."

这就是他要求学生们做的：,从以下四个选项中选取问题,“读者如何才能成为好读者”的答案：,“读者应该是书友会的成员“

耶鲁公开课 - 1945年后的美国小说课程节选

And the last example that we're going to talk about is thionyl chloride, so it's s o c l 2. This is another good step forward, because now we actually have four different atoms in our molecule.

我们要讨论的最后一个例子,是氯化亚砜，就是硫，氧，氯，二，这又是一个进步，因为我们的分子中现在有四个不同的原子了。

麻省理工公开课 - 化学原理课程节选

These four things are supposed to bring good luck.

VOA: special.2010.08.09

If you make three people-- or even better, four people a day feel good and they make-- they pay it forward and make four others feel good, and so on and so on.

如果你能让三个人-,甚至四个人度过美妙的一天-,他们会推展，让四人有美好的一天，以此类推。

哈佛公开课 - 幸福课课程节选

The month of February brought good news for the automobile sector as car sales jumped 22 percent, reversing four months of declining sales.

VOA: standard.2009.03.13

"If I could get done what I think needs to get done in four years, even if it meant that I was only president for four years, I would rather be a good president taking on the tough issues for four years, than a mediocre president for eight years,".

VOA: standard.2009.03.19