There are twelve boys and thirteen girls in Class Four, which means 25 students in total.

四班有12个男孩和13个女孩，这意味着总共有25个学生。

youdao

A:Oh, are you in Class Four?

噢，你在四班吗？

youdao

She is in Class Four, Grade Six with me.

她是在六年级课堂第四次认识的我。

youdao

Four teachers and the first class of eighty young women lived and studied in the building when the school opened.

VOA: special.2010.06.27

And so what we ended up doing is the last four weeks of class after we had grounded it in the history of the modern university, understood the structure of it, we had the students select topics that they were really interested in.

所以我们最后选择,在最后四周，在我们了解了,现代大学的历史，理解大学的结构之后，我们让学生们选择一些,他们真正感兴趣的话题。

普林斯顿公开课 - 人性课程节选

As I'll explain later in class, in Florida there used to be many, many, many varieties of oranges and now there are about four and there are commercials reasons for this occurring.

稍后我会详细解释,在佛罗里达州曾经有很多种类的橙子,而现在那里大概仅剩四种,这一切的发生归咎于商业上的原因

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Ainslie, 27, won gold in the smaller laser class four years ago before stepping up to the Finn class.

CNN: Britain, U.S. share sailing medals

What has handicapped the middle class in the last four years is not that higher-income earners did not pay a high enough tax rate, but rather, that job losses during the crisis were disproportionally high in traditionally middle class sectors, and accompanying gains during the recovery disproportionately low.

FORBES: How Will The Middle Class Fare In The Battle Over The Fiscal Cliff?

Within a generation, the middle class in China will be roughly four times the size of the American middle class population, according to the UN Population Division and Goldman Sachs.

FORBES: Within A Generation, China Middle Class Four Times Larger Than America's