How did ancient civilizations keep track of time?
古代文明是如何记录时间？
It's difficult for him to keep track of time since he has no watch.
让他说出确切的时间是困难的，因为他没有手表。
Joe can't keep track of time and he's often late for important meetings.
乔不能掌握时间，重要的会议他总是迟到。
For each user account, I keep track of time used, along with other information.
对于每个用户帐户，我跟踪使用的时间，以及其他信息。
Freckle just makes you want to keep track of your time.
Freckle只是确保你可以记录自己的时间。
Keep track of your browsing time with this helpful extension.
记录你的浏览时间。
Keep track of exposure time using badge.
用标记牌跟踪记录接触时间。
A simple chess clock that to keep track of two player play time.
一个简单的棋钟，两名球员的上场时间，为了保持轨道。
Starting a time log to better keep track of your day.
可以写时间日志来更好的追踪一天行程。
Starting a time log to better keep track of your day.
可以写时间日志来更好的追踪一天行程。
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