The same file also records other events, such as the date and time of the boot and the last run level change.

这个文件还可以记录其他事件，如启动的日期和时间，以及最近的运行级别更改。

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The first two lines give you the information about when the system was last booted and the date and details of the last run level change.

通过开头的两行，您可以了解最近一次启动系统的时间，以及最近一次运行级别更改的日期和详细情况。

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Radiation levels measured to date in other countries are far below the level of background radiation that most people are exposed to in every day circumstances.

其他国家迄今测量到的辐射程度，远低于大多数人每天都会受到的本底辐射水平。

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Downing Street said the agency had done a lot of good disruptive work but conceded the level of asset recover to date had been disappointing.

BBC: NEWS | UK | UK Politics | Assets Recovery Agency 'failing'

And when you do connect with a fellow mom, taking things to the next level -- a play date or coffee -- can be as nerve-wracking as telling your boyfriend you want to move in together.

CNN: A kind of courtship: Finding a mom friend in the big city

Women were more likely than men to date someone above their level: 38% compared to 21% of men.

FORBES: The State of the Office Romance, 2013