We have shown how a custom history stack can be created to track events within an Ajax application.

我们介绍了如何创建一个自定义的历史堆栈来跟踪Ajax应用程序中的事件。

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If you're using timers to track events and to make sure messages arrive in a timely manner, it's important to cancel these timers when a message is received.

如果您使用计时器跟踪事件，以确保消息及时到达，重要的是要在收到消息后取消这些计时器。

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Omega, which has timed Olympic events since 1932, USES four digital cameras as a backup to its electronic timing system. Images from track events have routinely been released by Omega.

从1932年开始就是奥运会计时商的欧米茄，为它的电子计时系统用四个数码相机进行备份，赛后这些图片一般都会由欧米茄公布出来。

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So,this country's track record around staging and managing safe events is equal to nonein the world."

VOA: standard.2009.06.12

And it's actually critically important to get used to things because it's a useful adaptive mechanism to keep track on new events and objects.

而习惯化实际上也是至关重要的,因为这是一种非常有用的适应机制,可以让你注意到新鲜事物。

耶鲁公开课 - 心理学导论课程节选

And just a couple of weeks after winning their respective races at the London Marathon, David and Shelly are both in action in much shorter track events.

BBC: SPORT | Other Sport... | Disability Sport | Steve Cram column

Lord Coe also said it was acceptable for rock music to be played during some track events, in a bid to attract a younger audience to watch athletics.

BBC: London 2012: Britain hails record Olympic gold tally

We saw an awful lot of the action, as well as doing our jobs, we used to get the equipment ready for the track events and escort the athletes to he field.

BBC: Games Maker volunteer points the way