Each full battery charge provides approximately three hours of use.

冲饱电可以满足三四个小时的使用。

youdao

Most portable devices are often in need of recharging after just 2 to 4 hours of use.

大多数便携式设备往往需要充电后仅2至4小时的使用。

youdao

Over the course of 200 hours of use on two test units, lumen output degraded by 25% on both of them.

有两台测试样机在使用了200小时后，都降低了25%的流明输出。

youdao

But traditional guidelines say not to use tPA if more than three hours have passed after the first signs of a stroke.

VOA: special.2009.08.12

And they have graciously meet available their complete Film library. Not just the documentaries but the films They use before cut together the documentary for every hour of documentary their might be a hundred more hours of source video and film.

他们还实现了完整的电影图书馆,不仅是成型的纪录片,还有最初未剪辑的完整电影,每一个小时的纪录片背后他们可能,有超过100个小时的资料片电影。

麻省理工公开课 - 媒体、教育、市场课程节选

Course assistants as we use the jargon are alumni of CS50 who return to the course for a couple of hours a week having taken it in prior years, to help you, the newest batch of students, one on one with office hours, with problem sets; and similarly do the CS function as they might in many courses.

课程助理用我们的行话说就是CS50校友0,他们在前几年一直都是一周回来几个小时,来帮助你们这些新生，在上机的时候以一对一的方式，帮助你们完成这些问题集,在很多其他课程中他们也是这么做的。

哈佛公开课 - 计算机科学课程节选

The LED bulb is rated for 40, 000 hours of use and can last over 15 years.

ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)

Less than three hours of use on a single charge is still the norm.

CNN: Tips for the PC Buyer

It runs all day and all night certainly living up to the advertised 10 hours of use.

FORBES: Nokia's Windows Phone Slowly Gaining Traction