It took half an hour to clean the orange powder off the bathtub.

用了半个小时才把浴缸里的橙色粉末擦掉。

《柯林斯英汉双解大词典》

youdao

youdao

For the fourth year, people are being urged to turn off their lights for one hour to call attention to the issue of climate change.

VOA: special.2010.03.22

I'm going to assign each chunk to a different writer. And they're going to go off and write that element, that hour's worth of stuff.

我将把每个部分分给一个作家,它们将撰写每一个部分,也就是每个小时的内容，你可以想象你得到的是什么：

麻省理工公开课 - 计算机科学及编程导论课程节选

Well partly this is just for fun-- this is what computer people sometimes do, intentionally or unintentionally but as also will see a really nice way to culminate the semester and frankly carve out a 10 hour block where you can bite off your final project's implementation surrounded by friends and the course's staff.

一部分只是因为好玩-,这是懂电脑的人有时会这么做，不管有没有意义,还有一部分原因是因为,以这种方式达到学期的高潮,并在朋友和这门课程教师的关注下,抽出10小时的时间完成最终的项目安装,是一件多么美妙的事啊。

哈佛公开课 - 计算机科学课程节选

His plane took off an hour and 20 minutes later from Manchester Airport, about two miles from the shopping center.

CNN: Boy, 11, hops plane to Rome without ticket or passport

Street lights in Warwickshire are to be turned off an hour later at weekends during the winter months following feedback from residents.

BBC: Warwickshire street lighting timings to change

They haggle for five bucks off an hour.

FORBES: Why An Educated Client Is A Good Client