My colleagues and I are studying something called augmented reality (a field of computer research dealing with the combination of real-world and virtual reality)," said Christopher Dede, professor in learning technologies at Harvard University, "Alien Contact," for example, is an exercise developed for middle-school students who use hand-held devices that can determine their location.
出自-2013年6月阅读原文
Because so many of our modern technologies and services depend on oil, nations, corporations, and institutions that control the trade in oil exercise extraordinary power
出自-2013年6月阅读原文
We learn from the passage that in today's world, whoever monopolizes the oil market will be able to exercise extraordinary power.
出自-2013年6月阅读原文
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VERB
运用;行使
If you exercise something such as your authority, your rights, or a good quality, you use it or put it into effect.
例句
They are merely exercising their right to free speech...
他们只是在行使他们的言论自由权。
'The powers delegated to me,' the President said, 'will be exercised with due responsibility.'...
“赋予我的权力，”总统说，“我将尽责履行。”
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VERB
活动;运动;锻炼
When you exercise, you move your body energetically in order to get fit and to remain healthy.
例句
She exercises two or three times a week...
她每周锻炼两三次。
Never keep on exercising if you have even the slightest chest pain...
即使你只感到很轻微的胸部疼痛，也不要继续锻炼。
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VERB
锻炼（身体部位）
If a movement or activity exercises a part of your body, it keeps it strong, healthy, or in good condition.
例句
They call rowing the perfect sport. It exercises every major muscle group.
他们称划船是最佳运动，它可以锻炼每一处主要肌肉群。
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N-COUNT
锻炼;练习
Exercises are a series of movements or actions which you do in order to get fit, remain healthy, or practise for a particular physical activity.
例句
These stomach exercises will tighten abdominal muscles...
这些腹部练习会增强腹肌。
I do special neck and shoulder exercises...
我做专门的颈部和肩部运动。
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N-COUNT
演习;操练
Exercises are military activities and operations which are not part of a real war, but which allow the armed forces to practise for a real war.
例句
General Powell predicted that in the future it might even be possible to stage joint military exercises...
鲍威尔将军预测将来甚至可能举行联合军事演习。
The military truck was taking 14 men on exercise in a remote area of Norway.
那辆军用卡车正载着14名士兵到挪威的一个偏远地区进行操练。
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N-COUNT
练习;习题
An exercise is a short activity or piece of work that you do, for example in school, which is designed to help you learn a particular skill.
例句
Try working through the opening exercises in this chapter...
做一做本章节的开篇习题。
He took up piano lessons, combining standard classical exercises with his own attempts at Gershwin.
他上钢琴课，一边进行标准的经典作品的练习，一边自己尝试练习格什温的作品。
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N-PLURAL
仪式；典礼
Exercises is an official ceremony, in which people make speeches and present awards.
例句
Vicky and Gary attended the graduation exercises at Columbia.
维基和加里参加了哥伦比亚大学的毕业典礼。
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N-COUNT
（尤指非预期的）活动，情况
If you describe an activity as an exercise in a particular quality or result, you mean that it has that quality or result, especially when it was not intended to have it.
例句
Her morning was an exercise in indecision. She tried on everything in her closet but couldn't remember what he'd liked...
她整个早晨都犹豫不决。她试穿了衣橱中的所有衣服，却不记得他喜欢哪一件。
As an exercise in stating the obvious, this could scarcely be faulted...
这说的都是些显而易见的事情，几乎不可能出错。
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VERB
使担忧;使不安
If something exercises you or your mind, you think or talk about it a great deal, especially because you are worried or concerned about it.
例句
This has been a major problem exercising the minds of scientists around the world...
这一直是困扰全世界科学家的一个重要问题。
The proper role of appeal judges is an issue that has long exercised the finest legal minds.
上诉法官应当扮演何种角色，这一问题长期以来困扰着那些最出色的法律人士。