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。
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。
Assign and track work during an iteration.
在迭代阶段分配和追踪工作。
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。
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
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