父亲接住了孩子两次，但第三次的时候后退了一步让他跌倒。
The father catches the boy twice, but the third time steps back and lets him fall.
5个用户三次的最终测试效果要远高于15个用户测试一次的效果。
The ultimate user experience is improved much more by three tests with 5 users than by a single test with 15 users.
对于大多数人来说，一组主要肌群的力量训练只需每周两到三次的训练就足够了。
For most people, one set of strength exercises for major muscle groups performed two to three times a week is sufficient.
但是经历了第三次的艰难化疗，他未能恢复过来，脸色依旧苍白，整个人也显得无精打采的。
But he failed to bounce back after the difficult chemo, remaining pale and listless.
参与者被随机地指定做一种每年一次共三次的影像学检查——低剂量螺旋CT或标准X射线胸透。
Participants were randomly assigned to receive three annual screenings with either the low-dose spiral CT or the standard chest X-ray.
这次的聚会被称作“第一场晚宴”，根据《财富》杂志报道，自那之后还有过第二次和第三次的晚宴。
The meeting was called the "first supper". There have been, according to Fortune, second and third suppers since then.
即使考虑了这一波动，TSI在前三次的太阳极小期中依然下降到相同的水平，然而在这次较长的极小期却不是这样子了。
Despite this variation, the TSI has dipped to the same level during the three previous solar minima. Not so during this recent elongated minimum.
在最早的报告中，研究人员结合所有目前关于该问题的研究发现，每周至少与家人共餐三次的孩子超重的几率比其他孩子小12%。
In the first report to combine all existing studies on the issue, they found kids who eat with their parents at least three times a week had 12 percent lower odds of being overweight.
HelpAReporterOut (HARO)是一个每日发布三次的电子邮件，并附带许多记者发出的“专家来源”要求。
Help a Reporter Out (HARO) is a 3 times daily email newsletter with dozens of 'expert source' requests from journalists.
感谢南非芭蕾剧院的拓展计划，如今在约翰内斯堡亚历山德拉镇，黑人孩子每周能上三次芭蕾课，而以前他们难得看到芭蕾舞。
Once a rarity for black children, ballet classes are now a treat three times a week in Johannesburg's Alexandra township, thanks to an outreach program of the South African ballet Theatre.
每周至少计划做三次30分钟的力量训练。
Schedule 30 minutes of strength training exercise at least three times per week.
根据美国劳动部统计，平均每个人一生中会更换三次职业，你又怎么能用大学所学的专业来规划整个一生呢？
How can you expect to map your entire life with a college major when, according to the U.S. Department of Labor, the average person changes careers three times?
旅途中，我们三次经过乌浒河岸，在绑了充气兽皮囊的木头筏子上渡河。
Three times in our journey we came to the Banks of the Oxus. We crossed it on rafts of wood with great bladders of blown hide.
服这种药，每日三次，你很快就会好起来的。
Please take this medicine three times a day, and you will soon get better.
选择月付费，你每周还有两到三次可以收到送货上门的水果和零食。
Pay monthly, and you’ll get fruit and snacks sent to your house two or three times a week.
我看过这部电影三次，每一次都是充满非凡感动的经历。
I've seen the movie three times, each one a tremendously moving experience.
我的头发非常柔顺，每周只需洗两到三次。
My hair comes out super soft and only needs to be washed about two to three times per week.
信使号自2004年发射升空以来已经三次掠过水星，最终计划在2011年3月进入太阳系最内部行星——水星的轨道。
MESSENGER has zipped right by Mercury three times since being launched in 2004, and is scheduled to enter orbit around the innermost planet in March of 2011.
午餐期间，或是在地铁上，我会使用我的RSS阅读器NewsRack阅读最新的新闻，一天两到三次。
I usually start NewsRack, my RSS reader of choice, two or three times a day to read the latest news over lunch or on the train.
这是你的《太阳的耻辱》，我读过不是一次，而是两次三次——这可是我对你的最高赞美。
Here's your 'Shame of the Sun.' I've read it not once, but twice and three times - the highest compliment I can pay you.
Skye可以在仅仅12.4秒内三次钻过一个网球拍——轻松地打破了Rubberboy之前保持的60秒的世界纪录。
Skye can pass through a tennis racket three times in only 12.4 seconds —smashing the record previously held by Rubberboy, at 60 seconds.
Skye可以在仅仅12.4秒内三次钻过一个网球拍——轻松地打破了Rubberboy之前保持的60秒的世界纪录。
Skye can pass through a tennis racket three times in only 12.4 seconds — smashing the record previously held by Rubberboy, at 60 seconds.
它是由詹姆斯·克拉克·麦克斯韦通过三次拍摄同一缎带得到的-每次在镜头上用不同的彩色滤光片。
It was taken by James Clerk Maxwell by photographing the ribbon three times - each time with a different color filter over the lens.
当1994年重新引入进站加油规则时，赛车策略的制定者们发现，在某些赛道上，进行两次甚至三次进站会比一次进站更具优势。
Shortly after the reintroduction of refuelling stops in 1994, the teams' race strategists worked out that at some circuits benefit could be gained from making two or three stops, rather than just one.
当1994年重新引入进站加油规则时，赛车策略的制定者们发现，在某些赛道上，进行两次甚至三次进站会比一次进站更具优势。
Shortly after the reintroduction of refuelling stops in 1994, the teams' race strategists worked out that at some circuits benefit could be gained from making two or three stops, rather than just one.
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