这些帽子分小、中、大三个尺码。

The hats are made in three sizes: small, medium and large.

巴纳德学院的一位大三学生伊丽莎白·德雷瑟说，“我更喜欢课后论文，因为这是真正关于写作的，所以你会有时间去编辑和做更多的研究。”

"I prefer take-home essays because it is then really about the writing, so you have time to edit and do more research," says Elizabeth Dresser, a junior at Barnard.

你能想象一片比印度大三倍的沙海吗?

Can you imagine a sea of sand three times bigger than India?

那是我大三和大四之间的暑假,我得到了一份暑期工作。

It was the summer between my junior and senior years, and I was offered a summer job.

大三时几乎每场讲座我都去，包括我涉及不到的或不感兴趣的话题。

In my third year, I went to almost every single lecture available. Including those involving topics I was not personally involved or interested in.

相伴着年轻人的是感化官而不是教师去法庭受审而不是去教室上课他们的大三留学之旅是去州立管教所当他们20多岁时没有商科的或英语的学位有的只是犯罪记录

Young people on this journey are meeting with probation4 officers instead of with teachers. They're going to court dates instead of to class. Their junior year abroad is instead a trip to a state correctional facility. And they're emerging from their 20s not with degrees in business and English, but with criminal records.

在过去的一百年中，爆发过的大火山有三座（埃特纳火山，斯特龙博利火山和维苏威火山）。

Three major volcanoes ( Etna, Stromboli, and Vesuvius) have erupted in the last hundred years.

坎特伯雷大主教就第三世界的债务问题向欧洲的领导人发出了警告。

The Archbishop of Canterbury has sounded a warning to Europe's leaders on third world debt

李家是个大家庭，有三代人同堂。

The LIS are a big family with three generations living together.