It lets you track message at certain points in their life cycle by invoking custom code from user exits while the message is passing through the message flow.

它允许您在消息通过消息流传递时调用用户出口中的自定义代码，从而在消息生命周期中的某个点跟踪消息。

youdao

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。

youdao

Track claims throughout the claim life cycle.

在整个索赔生命周期中跟踪索赔。

youdao

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)

The Velodrome cycling track will be converted into VeloPark, which, with the addition of a mountain bike course and road-cycle circuit, will be open for community and club sports.

BBC: Touring the cities of Olympics past