In this paper, according to the current track equation of motion system, some typical motion system track has been analyzed.

针对运动系统的一般轨迹方程，分析了几种典型的运动系统轨迹。

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Realise ", allows security officials to tag suspicious individuals and then have the system track them across multiple cameras."

认识，允许安全员标记可疑分子，然后系统在多个摄像机中跟踪他们。

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Based on the theory of repetitive control, the repetitive controller, which makes the output of the system track the periodic reference signals, is designed.

根据重复控制理论设计重复控制器，使系统的输出跟踪输入的周期性或重复性参考信号，从而达到跟踪控制的目的。

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And London's Transport Authority has promoted the Oyster card, a magnetic payment system that keeps track of where people have been and when.

VOA: standard.2010.04.01

It was like the off-track betting system.

这有点像场外下注。

斯坦福公开课 - 经济学课程节选

So, these memory cells are a way that your immune system keeps track of antigens that it's been exposed to for even if maybe the plasma cells that were producing antibody in response to the initial exposure have died and disappeared.

所以,这些记忆细胞,是人体免疫系统记忆抗原的一种方法,即使由浆细胞产生的抗体,在初次免疫应答中全部被消灭,记忆细胞仍然能迅速分化为抗体分泌细胞

耶鲁公开课 - 生物医学工程探索课程节选

Lacking a computerized system to track information about power outages, LIPA relied on an outmoded system of paper maps, photos and Post-it Notes to coordinate its service efforts with National Grid.

WSJ: Blizzard Barrels Toward Area

Alliance Tech claims its system is the first radio-frequency identification (RFID) system to track trade show and conference-goers.

FORBES: Magazine Article

Obama's unsuccessful medical-malpractice bill, co-sponsored with Hillary Clinton, would have mandated a vast data-collection system to track medical errors.

FORBES: November Election A Lawyer's Delight