time keeping

基本解释

Galileo designed a clock using a pendulum as the time keeping element in 1635.
1635年，伽利略设计了一种利用摇锤来计时的钟表。
http://dict.hjenglish.com
We've got one dev on my team (John Messerly) who's spending a lot of his time keeping our tree in sync with the Silverlight tree.
我们团队中有一个开发者（John Messerly）专门负责保持我们与Silverlight的同步。
If you find yourself in a situation where plans are fluid and you’re having a hard time keeping focused, try the following techniques.
如果你发现自己处于计划流产、很难保持专注的困难时刻，也许你该试试下面的技巧

They didn't violate any regulation at the time." But many Americans say they are outraged that executives were getting big bonuses while taxpayer dollars were keeping the firms alive.
So it's very important to be keeping in mind that any time you see a double bond, you have a pi bond there, so you're not going to see any rotation around the bond axis.
所以你们要记住,任何时候你们看到一个双键，这里面有π键，你们不会看到关于键轴的任何转动。
麻省理工公开课 - 化学原理课程节选
Isn't it difficult being a mother and a professor at the same time and keeping a balance between the two?
同时做母亲和教授是不是很困难呢？两者之间取得平衡不容易吧？
教授的梦想 - SpeakingMax英语口语达人

Mueller sees more at play than just clever judges who are good at time keeping.
FORBES: Why Apple Went To Dusseldorf