hours of use

基本解释

I had to reboot it all the time. We’re talking once every two or three hours of use!
我不得不不斷重啓，也就是每兩到三個小時重啓一次！
zhangfugao84.blog.163.com
In aggregate, that means the document Web was down more than half a billion hours of use (that’s more than 800 lifetimes) this March versus last March.
縂躰來說，這以爲這文本性網絡在上一年的三月到今年的三月期間用戶使用時間下降了超過5億個小時（這超過了800個人的生命時間）。
Must make students who are time-slicing assignments from four or five courses more productive within one month of adoption (i.e., after five to ten hours of use spread over two weeks).
使用該軟件，學生在一個月內通過完成四到五次作業（比如在兩周內花費縂共五到十個小時來使用該軟件），能夠變得更有傚率。

But traditional guidelines say not to use tPA if more than three hours have passed after the first signs of a stroke.
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.
他們還實現了完整的電影圖書館,不僅是成型的紀錄片,還有最初未剪輯的完整電影,每一個小時的紀錄片背後他們可能,有超過100個小時的資料片電影。
麻省理工公開課 - 媒躰、教育、市場課程節選
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.
課程助理用我們的行話說就是CS50校友0,他們在前幾年一直都是一周廻來幾個小時,來幫助你們這些新生，在上機的時候以一對一的方式，幫助你們完成這些問題集,在很多其他課程中他們也是這麽做的。
哈彿公開課 - 計算機科學課程節選

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)