First, it would complicate your code because you would have to manage a pool and track the life cycle of the XHR instances.

首先，它将使代码变得复杂，因为您将不得不进行池的管理，也不得不跟踪xhr实例的生命周期。

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Track claims throughout the claim life cycle.

在整个索赔生命周期中跟踪索赔。

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If issued at regular intervals during a normal production or test cycle, you can capture and track the number of messages that have been processed during that interval and the queue high depth.

如果在正常的生产或测试周期中按一定的间隔发出此命令，则可以捕获和跟踪在此期间已处理的消息数量和队列最高深度。

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The name alone is enough to raise eyebrows, but wait until you see the special features: a biorhythm calculator, a fatness function that calculates a user's height-to-weight ratio, a calendar for keeping track of your menstrual cycle and a calorie-counting function.

ECONOMIST: Mobile telephones

TomTom Multi-Sport includes all the features included in TomTom Runner, and also allows multi-sport athletes to track their distance, time, speed and other key metrics when they cycle or swim.

ENGADGET: TomTom makes own-brand GPS sports watches, no Nike swoosh in sight (updated: details)