Its ultimate aim is to build a series of laser tracking stations in various countries to provide a defensive shield for activity in space.

VOA: standard.2010.07.24

So that is really the design for the activity that we have been pursuing since dean done this convened educational technology task force in 1999.

这就是该活动的构思,自从1999年院长建设,教育技术队伍以来,我们一直在追求该目标。

麻省理工公开课 - 媒体、教育、市场课程节选

I think for any type of a night activity that you're looking for you could probably find it.

我觉得任何类型的夜生活，你在旧金山都能找到。

移民者的都市 - SpeakingMax英语口语达人

But one activity that legally is only supposed to be for people age twenty-one and over is drinking alcohol.

VOA: special.2009.08.07

On Monday I stressed that poetry was, for Frost, always a mode of work, and that work was for him a model of poetic activity.

星期一我强调过诗歌对弗罗斯特来说，是工作的一种形式，这种工作对他来说是一种诗般的运动。

耶鲁公开课 - 现代诗歌课程节选

The party opposes his plan to cut taxes for middle class Americans and use of government spending to increase economic activity.

VOA: special.2009.05.02

In different parts of the world you would see this sort of activity for finding food.

在世界任何地方,你都能看到有人在寻找食物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But since last year there has been little activity in the seven hundred fifty billion dollar market for commercial mortgage securities.

VOA: special.2009.09.04

Different amount of metabolic activity because one has a greater volume of cytoplasm than the other, for example, so these are exactly the right kinds of ideas.

大小不同,代谢活动的总量就会不同,可能因为一个细胞的胞质比另一个体积大,以上这些观点都是非常正确的

耶鲁公开课 - 生物医学工程探索课程节选

A report from last year said women business owners are responsible for three trillion dollars a year in economic activity.

VOA: special.2010.04.23

The regime for him is not one branch of human activity among others it is the fundamental principle or ordering principle that makes all the others even possible.

对他而言,政体并非人类活动的一个分支,而是基本的原则,或说是指导原则,使所有其它学科化作可能,这就是为何。

耶鲁公开课 - 政治哲学导论课程节选

Many Americans blamed President Grant for not acting quickly enough to stop the activity of his two friends.

VOA: special.2010.02.18

And so, rewarding children has a danger, which is if you give them too much reward and too much a value for what they're doing they will denigrate the activity.

所以奖励孩子是有隐患的，如果你给他们太多奖励,赋予他们的活动太多价值,他们就会贬低这个活动。

耶鲁公开课 - 心理学导论课程节选

A spokesman for the Convention and Visitors Bureau,Steve Lewis,says economic activity last month was down five percent from February of last year.

VOA: special.2009.03.30

most people tend to over-train for whatever activity they're trying to do.

大部分人不管试着做什么都会过度练习。

健康生活 - SpeakingMax英语口语达人

Guided tours of the Bureau of Engraving and Printing are a popular activity for visitors to Washington,D.C.

VOA: special.2010.11.15

Two years ago, the Centers for Disease Control released its first ever Physical Activity Guidelines for Americans.

VOA: special.2010.06.08

Doctors say not to return to physical activity for a few hours because serious conditions could develop.

VOA: special.2010.07.27

Art teacher Samantha Stankiewicz says the activity gives students a way to express empathy for victims.

VOA: special.2011.03.31

"I don't want to spend more than twenty dollars for a backpack." Consumer spending is seventy percent of the economic activity in the United States.

VOA: special.2009.08.21

For children under two, doctors are advised against it if there is: Normal mental activity.

VOA: special.2009.10.28

For others, Title Nine covers "any education program or activity" receiving federal financial assistance.

VOA: special.2010.03.04

The Pacific Tsunami Warning Center watches for earthquake activity that could cause tsunamis.

VOA: special.2009.03.17

A big place for outdoor activity is Millennium Park near Lake Michigan.

VOA: special.2009.01.12

Too many advertisements for food. Too little activity.

VOA: special.2009.08.06

Twenty-five stations watch for possible earthquake activity.

VOA: special.2009.03.17

"Israelis have facilitated greater freedom of movement for the Palestinians, and have discussed important steps to restrain settlement activity.

VOA: standard.2009.09.22

"So the combination of eating more calorie-dense food and having fewer opportunities for physical activity, that's what creates this obesity epidemic."

VOA: standard.2010.07.02

"And poor people tend to live in neighborhoods that are less safe and have fewer opportunities for physical activity."

VOA: standard.2010.07.02

Officials initially blamed "insurgent activity" for the casualties, but later said it was possible the soldiers were hit by friendly fire.

VOA: standard.2009.11.07