In this paper a method to locate and track a 3-d moving emitter using measurements of direction of arrival and time of arrival is discussed.

本文讨论了利用到达角和到达时间测量数据对三维运动辐射源进行定位与跟踪的方法。

youdao

X-Y double-axis gimbal by X axis transferring D could track objects near zenith, has wider tracking region than regular X-Y double-axis gimbal.

偏X-Y双轴式光电跟踪系统可以解决过顶跟踪问题，其跟踪范围与规则X-Y双轴式光电跟踪系统相比有很大提高。

youdao

The tracking from two or more sensors will enable precise calculation of a stereo, 3-d track of the missile's flight path, enabling appropriate defensive actions.

由两个或多个传感器进行跟踪将获得立体精确计算，三维跟踪导弹的飞行路径，采取适当的防御措施。

youdao

I was an undergraduate here in 1995 as a freshman, I came in thinking I was going to major in government and sure enough I started off on the track; I'd like history, I'd like government, English, these kinds of things in high school.

995年我作为本科新生进入哈佛，我刚来的时候想主修政治,后来我就沿着这条路走了下去，我喜欢历史，政治和英语，就像高中的时候一样。

哈佛公开课 - 计算机科学课程节选

Before long, users were lost in a sea of their own passwords, and inevitably they'd lose track of them.

FORBES: Escaping Password Purgatory

"Red Bird" is Arborea's most accessible and traditional track (it'd fit well on any Gillian Welch CD), while "Black Mountain Road" is one of its more experimental.

NPR: Arborea: 'Black Mountain Road'

Based on Samsung's hacker-friendly track record, you'd generally expect one of it smartphones to come with an unlocked bootloader, making it easy to update or tweak with unofficial ROMs. That's not the case with Verizon's imminent version of the Galaxy S III, however.

ENGADGET: Verizon Galaxy S III has locked bootloader (but it's been rooted anyway)