对陨石球粒质地的研究证实，它们的冷却速度相当快，短则几分钟，长则数小时，因此形成陨石球粒的高温活动肯定是局部的。
Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized.
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。
Hours of feverish activity lay ahead. The tents had to be erected, the stalls set up.
一天的活动分作6个时段，每个时段一小时。
在加拿大的安大略省，高中生被要求做40个小时的志愿活动。
In the Canadian province of Ontario, high school students are required to do forty hours of volunteering.
然而，有了宇航服，宇航员可以在太空中活动几个小时。
With a space suit, though, astronauts can move around in space for several hours.
学生每周至少应该有三个小时的体育活动。
School students should have at least three hours of active physical activity each week.
2020年5月，国家卫生健康委员会敦促学校确保学生每天至少有两个小时的户外活动。
In May 2020, the National Health Commission urged schools to make sure that students have at least two hours of outdoor activity a day.
中国也采取了措施来保护学生的视力，比如课本上印刷更大的字体、每天至少两个小时的户外活动、定期视力检查、减少看电子书的时间等。
China has also taken steps to protect the students' eyesight, such as larger printing in students' textbooks, at least two hours' outdoor activities a day, regular eyesight checking, less time on E-books and so on.
不过不管你们选择的是什么时间，切记要坚持，并且在睡前一个小时要减少孩子的活动。
Whatever bedtime you choose, be sure to stick to this schedule and begin winding down with bedtime activities about an hour before.
就寝前一个小时允许做些轻松的活动，看新闻或者回复电子邮件并不指望。
Allow one hour before bedtime for a relaxing activity. Watching the news or answering e-mails does not count!
作为世界最大的烟草生产国和消耗国，中国希望通过这一小时的无烟活动对控制烟草做出贡献。
As the largest producer of cigarettes in the world, with most consumed domestically, the country aims to contribute one hour without cigarettes to tobacco control.
成为一种恒温动物，有很明显的好处，比如我们不必一大早就坐在太阳底下先晒上几小时，然后才能活动身体。
There are obvious benefits to being warm blooded. Like not having to sit in the sun for a few hours just to get going in the morning.
我建议将工作分解到较低级别，分解到完成每个不再分解的活动所需的时间不多于80小时，并且完成这个活动所需要的资源也是十分清晰的。
I recommend breaking down the work into lower levels until each remaining activity is less than 80 hours, and it is clear what is required to complete the activity.
报告中提到由世界野生动物基金会发起的很受欢迎的活动“地球一小时”，还盛赞了另一个私人组织能源基金会所作的贡献。
The report mentions favorably “Earth Hour,” a project by the World Wildlife Fund, and praises the work of another private organization, the Energy Foundation.
报告中提到由世界野生动物基金会发起的很受欢迎的活动“地球一小时”，还盛赞了另一个私人组织能源基金会所作的贡献。
The report mentions favorably "Earth Hour," a project by the World Wildlife Fund, and praises the work of another private organization, the Energy Foundation.
今年是世界自然基金会第四次举办“地球一小时”活动。
This year's was the fourth annual Earth Hour, organized by the World Wildlife Fund .
吉萨大金字塔以及狮身人面像在2009年的地球一小时活动中熄灯变暗，其他世界性的地标建筑物如雅典卫城、艾菲尔铁塔和旧金山金门大桥都加入了熄灯行列。
The Great Pyramids of Giza, sphinx included, joined world landmarks such as the Athens Acropolis, the Eiffel Tower, and San Francisco's Golden Gate Bridge in going dark for Earth Hour 2009.
而有些孩子，居住的地方不能或不适宜做户外活动，那么“绿色”一小时可以去公园、后院和走廊玩。
For children who live in areas where unsupervised outdoor play isn't safe or accessible, a "green" hour can take place in a park, backyard, even on a porch.
在研究中，沉思新手在周末参加半个小时的IBMT群体活动，为期一个月。
In the study, meditation novices took part in IBMT group sessions for half an hour on weekdays for a month.
如果你每周工作80小时，错过家庭聚餐和活动，晚上只睡5个小时，那孩子肯定也不会优先考虑从容休息。
If you work 80 hours a week, miss family dinners and activities, and only sleep 5 hours a night, you can be sure that your kid won't prioritize downtime either.
2009年地球一小时活动期间，洛杉矶市政厅建筑陷入了黑暗之中，看起来似乎与夜空融为了一体。
During Earth Hour 2009, Los Angeles' unlit City Hall building seemed to fade into the night sky.
2010年的地球一小时活动将于3月27日在当地时间的8点30分开始。
For 2010, Earth Hour will take place on March 27 at 8:30 p.m. local time.
由于气温的极端升降，只有深夜和凌晨的一个小时能够拍到这些大猫的活动。
Due to the extreme rise and fall in temperature, you only get an hour at night and in the early morning to get pictures of the cats actually doing something.
保证中小学生每天一小时校园体育活动。
We will ensure that primary and middle school students do one hour of physical exercise in school every day.
其中的一半从早上10点到晚上10点集体活动12小时，剩下的一半也做相同的事情，但是单独来进行。
Half then spent twelve hours in group activities, from 10 am 'til 10 PM. The other half conducted similar activities, but did so alone.
媒体企业需要提升他们的节目质量，观看电视这一平均花费美国人每天4.5小时的活动应该比现在更扣人心弦。
Media firms will improve their game in response. The activity that diverts the average American for some four and a half hours each day should become more gripping, not less.
因此在每天10小时的窗口中，大约有60MB 的活动，速度是每小时6 MB到每小时8 MB。
So within a window of 10 hours per day, there will be approximately 60 MB of activity, at a rate from about 6 MB per hour to a maximum of 8 MB per hour.
2008年地球一小时活动期间，澳大利亚的珀斯市陷入了黑暗之中。
Darkness descends on Perth, Australia, during Earth Hour 2008.
2011年是关掉电源一小时活动的第5年，它最初由世界野生动物基金发起。
2011 marks the fifth year of cutting power for the hour in the initiative organized by the World Wildlife Fund.
为集体表达对全球气候变暖的关切，中国数百酒店、超市、地标建筑和旅游景点将于27日晚开展"地球一小时"活动。"
Hundreds of hotels, supermarkets, major landmarks and tourist attractions in China will turn off their lights Saturday night for Earth Hour, a collaborative show of concern for global warming.
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