所用的时间从不会超过一个小时。

It never takes more than an hour.

《牛津词典》

在这个例子中，X表示所用的时间，Y表示所行的距离。

In this example 'X' denotes the time taken and 'Y' denotes the distance covered.

《牛津词典》

他们所用的时间甚至不超过3秒。

They won't even spend three seconds.

youdao

Alright. So, since we have these terms defined, we know the frequency and the wavelength, it turns out we can also think about the speed of the wave, and specifically of a light wave, and speed and is just equal to the distance that's traveled divided by the time the elapsed.

好了，我们已经定义了，这些术语，我们知道了，频率和波长，现在可以来考虑,波的速度了，特别是光波的速度，速度等于它走过的距离,除以所用的时间，因为我们。

麻省理工公开课 - 化学原理课程节选

You can actually say big O of 1, big O of 1 being constant time, the same number of steps.

其复杂度为O，表示时间是一个常量，所用的步数是相同的。

哈佛公开课 - 计算机科学课程节选