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。
At the node level you can track the passing of the message from one node to the other. Consider the following example scenario.
在节点级别，您可以跟踪消息从一个节点到另一个节点的传递。
Most people regard overtaking as meaning cars passing each other on the track, during the race.
我们通常认为的超车仍然是赛车在赛道上的超越。
Curve superelevation, critical transversal track resistance and gauge keeping strength are the principal parameters governing the passing speed of trains over the curve.
曲线超高、轨道临界横向抗力、轨距保持强度是控制列车曲线通过速度的主要参数。
The main cause is still the increase of the passing gross load on track and the average axle load of freight cars.
主要因素仍然是线路通过总重和货车平均轴重的逐年增加。
On the base of the reference of track total passing weight, the analysing methods of engineering analogy and economy life-span are put forword.
一是提出了科学确定修理周期要求，在参考线路累计通过总重的基础上，应用工程类比分析法和经济寿命分析法进行综合分析确定；
Dividing track of athletics games usually uses the oblique line passing method by using draw lots to determine track orders, it is traditional method and has the certain sufficiency.
田径运动会径赛分道跑项目分组编排采用斜线通过法来进行，分组后检录处采用抽签方法确定道次，这一传统的方法，存在一定的不足。
Train track occupancy recognition is to determine if the train is passing over a switch and to supply reliable information for train positioning system and train control system.
列车轨道占用识别目的是在平行的多轨道区域识别列车所占用的轨道信息，为列车定位子系统或控制系统提供可靠的信息。
The use of this type bogie can minimize lateral track force occurred during passenger train passing through curves at high speed.
采用这种转向架可降低列车高速通过曲线时的横向轨道力。
Passing by a small charming village, runners hit single track which hugs the glacier-fed river for 12km through alpine forests and rugged vegetation.
沿途会经过一个景色宜人的小村子，跑者要沿着冰川河流旁边的单轨跑道跑行12公里，穿过高山森林和崎岖的植物带。
Passing by a small charming village, runners hit single track which hugs the glacier-fed river for 12km through alpine forests and rugged vegetation.
沿途会经过一个景色宜人的小村子，跑者要沿着冰川河流旁边的单轨跑道跑行12公里，穿过高山森林和崎岖的植物带。
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