Astronauts Borman and Lovell had been in space more than three hundred thirty hours.

VOA: special.2009.07.01

A studio of three hours' lecture in a large lecture hall, and two hours of recitation in groups of thirty.

在一个大的讲堂的教室里,讲三个小时讲座，并以三十人为一组,进行两小时背诵。

麻省理工公开课 - 媒体、教育、市场课程节选

We can spend late hours rendering something and then have a go-by in thirty seconds.

我们可以用后来的时间,对一些东西做艺术处理,然后跳过这三十秒。

麻省理工公开课 - 媒体、教育、市场课程节选

It limited residents to no more than thirty hours of continuous duty.

VOA: special.2009.06.02

There's twenty-one days, there's thirty days, there's twenty-four hours. Now look at this!

有二十一天法,三十天法,二十四小时法,还有这个

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

After thirty-six hours, Brown was captured in the building that served as the fire engine and guard house.

VOA: special.2009.11.06

On July thirty-first, the ship traveled six hundred and one kilometers in only twenty-four hours.

VOA: special.2009.12.23

Five hours after the explosion, flight controllers advised firing the rocket for thirty-five seconds.

VOA: special.2009.07.22

More than four-thousand shells had been fired during the thirty-three hours of fighting.

VOA: special.2009.08.13

The two astronauts spent more than thirty-one hours on the moon.

VOA: special.2009.07.29

He wrote this about his experience: I know that during that long and racking march of thirty-six hours over the unnamed mountains and glaciers of South Georgia it seemed to me often that we were four,not three. The American poet T.S.Eliot was influenced by Shackletons description.

VOA: special.2010.02.24