To display an object track, draw a map for the time and date of the start of the track, and locate the object on the map.
要显示一个物体的轨迹，按照你要观察的轨迹起点日期新建一张星图，并在星图上选择这个天体。
The PhantomReference class is useful only to track the impending collection of the referring object.
phantomreference类只能用于跟踪对被引用对象即将进行的收集。
Instances track data about multiple occurrences of the object that a category relates to.
实例跟踪关于类别相关对象的多个匹配项的数据。
The pilot was ordered to keep track of the strange object.
那位飞行员接到命令去跟踪这个奇特的物体。
Keep track of the current position and velocity of an object.
对峙今朝的地位和速度跟踪对象。
Click on the object you wish to display a ground track of to select it.
点击选择你要显示其地面轨迹的卫星名称。
An application can track the changes to the composite object instead of the individual components.
应用程序可以跟踪对复合对象(而不是单个组件)的更改。
Keep track of the current position and velocity of an object. More...
保持目前的位置和速度跟踪对象。
They also acquire the ability to visually track an object moving from side to side.
他们也获得了从视觉上随着一个物体从一边移到另一边的能力。
They also acquire the ability to visually track an object moving from side to side.
他们也获得了从视觉上随着一个物体从一边移到另一边的能力。
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