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 It was a period of intense activity.
 - 那是活动激烈的时期。 《牛津词典》
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 Parents encourage every activity imaginable.
 - 父母鼓励一切可能的活动。 《柯林斯英汉双解大词典》
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 Economic activity often follows a cyclical pattern.
 - 经济活动常常遵循周期性模式。 《牛津词典》
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 Does such an activity constitute a criminal offence?
 - 难道这样的活动也算刑事犯罪吗? 《牛津词典》
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 The test records the electrical activity of the brain.
 - 这个测试显示出大脑的电流活动。 《柯林斯英汉双解大词典》
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 The rehearsal studio is buzzing with lunchtime activity.
 - 排练场被午餐时段活动搞得很热闹。 《柯林斯英汉双解大词典》
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 If the weather is wet or cold choose an indoor activity.
 - 如果下雨或是天气寒冷,就选择室内活动。 《柯林斯英汉双解大词典》
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 He had been engaging in some kind of kinky sexual activity.
 - 他一直在进行一些反常的性活动。 《柯林斯英汉双解大词典》
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 Cooperative activity is essential to effective community work.
 - 要把社区工作做好,协作活动是必不可少的。 《牛津词典》
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 Physical activity is an important factor in maintaining fitness.
 - 体育活动是保持健康的一个重要因素。 《柯林斯英汉双解大词典》
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 They are busy preparing for a hectic day's activity on Saturday.
 - 他们正忙着为星期六这一天热闹的活动做准备。 《柯林斯英汉双解大词典》
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 Is the property or any part thereof used for commercial activity?
 - 这一房产或其中任何部分有用于商业活动吗? 《牛津词典》
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 Mr. Dobson promised to widen the organization's scope of activity.
 - 多布森先生答应扩大该组织的活动范围。 《柯林斯英汉双解大词典》
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 Volcanic activity has created thermal springs and boiling mud pools.
 - 火山活动产生了温泉和沸腾的泥浆池。 《柯林斯英汉双解大词典》
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 The index is the government's chief gauge of future economic activity.
 - 这个指数是政府对未来经济活动的主要判断标准。 《柯林斯英汉双解大词典》
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 Children are supposed to get 60 minutes of physical activity every day.
 - 儿童应该每天获得60分钟的体育活动。 《柯林斯英汉双解大词典》
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 You become so deeply absorbed in an activity that you lose track of time.
 - 你是那么专注于一项活动,以致忘了时间。 《柯林斯英汉双解大词典》
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 Business is a competitive activity. It is very fierce and very unforgiving.
 - 商业是一种竞争性强的活动:很残酷,也不允许任何错误。 《柯林斯英汉双解大词典》
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 After a day of air and activity, you should be in the mood for a good meal.
 - 在户外活动了一天,你应该想好好吃一顿。 《柯林斯英汉双解大词典》
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 Baltimore in its heyday was a major centre of industrial and commercial activity.
 - 巴尔的摩在其鼎盛时期曾是工商业活动的主要中心。 《柯林斯英汉双解大词典》
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 Hours of feverish activity lay ahead. The tents had to be erected, the stalls set up.
 - 长达数小时紧张忙乱的活动就在前面,帐篷要支起来,摊位要搭起来。 《柯林斯英汉双解大词典》
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 Changes in the money supply affect the level of economic activity and the interest rate.
 - 货币供给的变化影响经济活动水平和利率。 《柯林斯英汉双解大词典》
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 The Americans recognize that the U.N. can be the channel for greater diplomatic activity.
 - 美国人承认联合国可以是更重要的外交活动的渠道。 《柯林斯英汉双解大词典》
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 There may be a price to pay for such relentless activity, perhaps ill health or even divorce.
 - 这样没完没了的活动可能是要付出代价的,也许是不良健康状况甚至是离婚。 《柯林斯英汉双解大词典》
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 Even if you are not prepared to work up a sweat three times a week, any activity is better than none.
 - 即使你不准备1周流3次汗,任何活动总比没有要好。 《柯林斯英汉双解大词典》
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 What is the new outdoor activity?
 - 新的户外活动是什么? 
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 Reading can be a social activity.
 - 阅读也可以是一项社交活动。 
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 We love outdoor activity.
 - 我们热爱户外活动。 
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 We have this massive activity sphere.
 - 我们有这个巨大的活动范围。 
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 What's your favorite outdoor activity?
 - 你最喜欢的户外活动是什么?