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Space Policy Directive-3 lays out general guidelines for the United States to mitigate the effects of space debris and track and manage traffic in space.

《空间政策指令3》为美国制定了一般性指南，以减轻空间碎片的影响以及跟踪和管理太空交通。

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She told BuzzFeed News that her freshman chemistry class required her to use Connect, a system provided by McGraw Hill where students can submit homework, take exams and track their grades.

她告诉 BuzzFeed 新闻，她的大一化学课要求她使用麦格劳·希尔公司提供的 Connect 系统，学生可以在该系统中提交作业、参加考试并跟踪他们的成绩。

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Jackie won honors in baseball,basketball, football and track.

VOA: special.2009.04.05

I had two daughters. We made the track across the Ohio and New Jersey turnpikes. We came north.

我有两个女儿，我们一路穿过,俄亥俄和新泽西的高速公路朝北走。

普林斯顿公开课 - 人性课程节选

Well, first it is important because it's-- you need to track what the population is eating and also individual intake.

说它重要首先是因为,你需要探寻人们都吃什么,还有个体摄入量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

At this level, almost every company screens for the proper skill set, motivation, and track record.

FORBES: Preparing To Fire an Executive

For the most part, you can create a playlist of stocks and track the performance.

FORBES: Mobile App Tries to Find the Next Warren Buffett

This is followed by another road and track segment, longer than the first, however.

BBC: SPORT | TV/Radio Listings | Grandstand | Three-day eventing explained