You might also use a timer variable to keep track of how many ticks of the clock you've been in the current state.

还可以使用计时器变量记录保持当前状态的时钟嘀嗒数。

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For example, you could set a cron job to run this script once per hour to help you keep track of how many PHP sessions are being used around the clock.

该脚本可用于完成许多任务，举例来说，您可以设置一个cron作业来每小时运行一次这个脚本，以帮助您跟踪24小时内所使用的php会话的数量。

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An outer layer on each of the eight surrounding pyramids selectively blocks out portions of the structures throughout the month, keeping track of the lunar cycle like hands on a clock.

周围8个金字塔中每一个上的外层有选择地摆出整个月的某一结构部分，像手上的钟表一样记录着月亮的周期。

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To complete the first route by 2008, Minister Liu, whose ambition and flamboyance earned him the nickname Great Leap Liu, drove his crews and engineers to work in shifts around the clock, laying track, revising blueprints, and boring tunnels.

NEWYORKER: Boss Rail

"Amtrak crews have been working around the clock to clear affected track of large amounts of snow, in excess of several fee in some cases, " the rail line said in a statement.

CNN: Northeast digs out; storms hit Upper Midwest, South

"He might get up this morning and call (coach) Ampie (Louw) and say he wants to be at the track at one o'clock, " Van Zyl said.

NPR: Newspaper Publishes Photo Of Pistorius In Blades