One hour marks one twenty-fourth of a turn, or fifteen degrees.

VOA: special.2010.07.14

We will give many lectures, ten or fifteen minutes of lectures, and that will be broken up by desktop experiments where the students collaborate with each other, doing experiments.

我们会讲很多小讲座，十或十五分钟一个，这些讲座中会间隔地穿插,桌面实验,学生可以一起合作，做实验。

麻省理工公开课 - 媒体、教育、市场课程节选

Alice is fifteen years old at the time, not an entirely unreasonable age for an actress or an amateur actress playing the maidenly but strong-headed Lady of Milton's mask.

当时爱丽丝，15岁，她的年龄完全不适合演弥尔顿所描绘的,沉稳而意志坚强的小姐。

耶鲁公开课 - 弥尔顿课程节选

Some people have a fifteen- or twenty-year loan, often with an adjustable interest rate instead of a rate that never changes.

VOA: special.2011.01.24

Now today, the standard mortgage, which you would probably get when you buy your first house, is not fifteen or twenty--it's thirty years.

今天,标准的抵押贷款,当你买第一套房子时你或许就能得到,期限不是15或者20年,而是30年

耶鲁公开课 - 金融市场课程节选

Their study looked at the causes of disability among fifteen thousand people age sixty-five or older in seven countries.

VOA: special.2009.12.28

For example, a person who speaks and reads fifteen languages, or a medical doctor who operates on the brain.

VOA: special.2010.06.27

After a few weeks, increase your time to fifteen or twenty minutes, and increase the number of days.

VOA: special.2010.06.08

On an average day, nearly everyone fifteen years of age and older took part in a non-work activity like watching television, socializing or exercising.

VOA: special.2011.07.22

So each hour's time difference between the ship and the starting point marks a ship's progress of fifteen degrees of longitude to the east or west.

VOA: special.2010.07.14