Take the example of Facebook. It was launched in two thousand four as a social network just for Harvard students.

VOA: special.2009.09.14

There's sort of a period around the age of four, four and a half, where kids make the transition from failure to success.

儿童在大约四岁四岁半时,会发生从失败向成功的转变

耶鲁公开课 - 心理学导论课程节选

It's been four and a half months now that I've been in and

我加入部队有四个半月了，

想当军人的理由 - SpeakingMax英语口语达人

A recent report predicted that the number of mobile phone accounts worldwide will reach almost four and a half billion this year.

VOA: special.2009.11.02

That you put together diseases of the heart, cancer, stroke, and then chronic respiratory diseases, those first top four are accounting for a huge number of deaths.

心脏病,癌症,中风,和慢性呼吸道疾病,这四大疾病加起来造成了大量死亡

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In nineteen sixty-four Abe Pollin bought a failing basketball team from Baltimore,Maryland and brought it to his hometown.

VOA: special.2009.12.27

Let's say you have to go through three or four operations to get a final number, well, do it algebraically.

让我们说,你不得不通过3-4个操作,才能得到最终的数，好吧，用代数方法求解。

麻省理工公开课 - 固态化学导论课程节选

But recent findings suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.09.22

Well, I'm going to get back, let's just draw a bigger square than usual that's roughly four times the size.

嗯，返回的是，我画一个更大的方形,大致上是4倍的大小。

哈佛公开课 - 计算机科学课程节选

But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

I would say absolutely. And I would say even I could notice over the past four years I feel and there is a different tenor.

我答案是肯定的，我想说,甚至我都能感受到过去四年里,学校氛围发生的变化。

普林斯顿公开课 - 人性课程节选

Two of his daughters died. His wife died in nineteen-oh-four after a long sickness.

VOA: special.2010.03.21

As you can see, it's nothing but a pattern of four bars plus four bars plus four bars plus four bars.

大家可以看到,它只不过是一种模式,若干段四个小节的叠加

耶鲁公开课 - 聆听音乐课程节选

Rolling Stone Magazine gives the CD four and a half out of five stars.

VOA: special.2009.05.29

At some point, maybe a week later, four to eight days later, you would start to see antibody levels rise.

之后,或许一周之后,四天到八天之间,就可以看到抗体的浓度开始上升

耶鲁公开课 - 生物医学工程探索课程节选

At four and a half months, Finn is not talking, but he definitely responds to what his mother says.

VOA: standard.2010.05.05

They want to get as far away from each other possible, the ideal angle is 120. But what we have here is a four-membered ring, so what angle does 90° that have to be, that bond? 90 degrees.

它们想要尽量远离彼此，最理想的是形成120°键角,但现在是个四元环,所以这键角应该多大？

麻省理工公开课 - 化学原理课程节选

Four and a half years ago, the National Zoo unveiled its new addition to great fanfare.

VOA: standard.2010.02.02

But, it's about a four-hour film, and it's called The Sorrow and the Pity and it's about Clermont-Ferrand, which is in the Massif Central here.

那电影大概四个半小时,叫哀伤与怜悯,是关于克莱蒙费朗的,在中央高地这里

耶鲁公开课 - 1871年后的法国课程节选

Water in the South Korean portion of the Imjin River surged Sunday more than four and a half meters, about twice its usual level.

VOA: standard.2009.09.07

Because as a young, four or five-year-old company, if we're trying to attract somebody from a company that's been around since before I was born, that is in the computer industry, that's pretty hard.

因为作为一个只有四五岁的年轻公司，如果我们想要吸引大家的注意,尤其是在公司创立之前，这在电脑行业是很难的。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Here in South Korea, the KOSPI index tumbled more than four and a half percent Friday.

VOA: standard.2009.11.27

Four decades in a row the production of American cotton nearly doubled.

美国棉花产量翻倍的传奇,持续了四十年

耶鲁公开课 - 美国内战与重建课程节选

But other students begin at a community college to save money, then finish at a four-year college or university.

VOA: special.2009.07.16

It was about four feet by two-and-a-half feet.

长约四英尺宽约两点五英尺。

耶鲁公开课 - 旧约导论课程节选

Safety experts estimate that the restraining devices save more than four thousand lives a year in the United States alone.

VOA: special.2010.02.09

Did he do a handstand, solve the four-color map theorem?

他会倒立，解决这个四色地图原理？

耶鲁公开课 - 心理学导论课程节选

Jeannette Cook says she attends four or five jewelry shows a year where she teaches workshops and sells her products.

VOA: special.2009.05.18

The four crew members escaped to a lifeboat.

四人逃上了救生艇。

耶鲁公开课 - 公正课程节选

Americans spend the most time out of any other people in the world volunteering in average four hours a week, volunteering outside their job which may also have a social objective more than any other people in the world.

比其他任何人所花的时间都多,平均每周有四个小时做志愿者的工作，做与自身工作无关的善事,他们比世界上其他人更具社会目标。

哈佛公开课 - 幸福课课程节选