他在一次练习课上扭伤了背部。
刘翔在一次练习事故中伤了一只脚。
在一次练习中，受训人员围成一个圈，每个人说出一段留下深刻印象的操场游戏经历。
During one exercise the trainees gathered in a circle and each was asked to recall a playground experience that had left a lasting impression.
文中的例子可能可以在更老的版本的Perl、UNIX以及其它操作系统下运行，但是如果不行的话，读者应当把它看作是一次练习来解决。
The examples may work with earlier versions of Perl and UNIX, and other operating systems, but their failure to function should be considered an exercise for the reader to solve.
这些练习在跑步后或者跑休日（经15分钟的慢跑热身后）进行，各组练习每周进行一次，持续四周。
Try each of these once a week for four weeks. Do them after a run, or on a nonrunning day with 15 minutes of jogging to warm up.
每天在不同的时间段做一组或两组练习。每一次可以重复3-10次。
Do one or two sets per day at different times… and perhaps 3-10 reps each time.
这是很好的练习，在柱坐标下再算一次，看看结果一不一样。
A good exercise: do it in cylindrical and see if you get the same thing.
在我上大学的时候，我特意不去选那些可能需要进行公众演讲的课程。唯一的一次强制演讲也成了机械背诵练习。
When I was in college, I manipulated my class schedule to avoid public speaking encounters. The one mandatory speech class became an exercise in rote memorization.
在感受从中获得的好处时,你会发现每坐一次练习,都比上一次感觉更加的放松.为了获得最佳的效果建议每天至少练习一次,连续练习21天.然后无论何时都可以随心所欲的使用它来缓解压力或焦虑.
To get the most of this technique it's recommended that you practice at least once each day for 21 days. Then use it as often as you like and whenever you're feeling stressed or anxious.
在每周一次的90分钟练习期间，克洛伊找到了每位青少年渴望的：一种归属感。
During weekly 90 minute practices, Chloe found what every adolescent craves: a sense of belonging.
有一次，他们在阳光下各持一把剑练习着。
Once in the sun holding a sword of Damocles over practicing.
一次练习时，我怎么练也练不好这用毛笔写的“龙”字我放弃了，把毛笔在纸上乱图了一番后就回到屋里看电视。
An exercise, I also practiced how well this practice with a brush to write the "dragon" character I gave up the brush on paper back after some chaotic map of the room watching TV.
周四晚进行的是最后一次派彩，在现场出现很多熟悉的面孔正在进行他们的最后一次练习。
A final rehearsal was held on Thursday night, where some familiar faces made finishing touches to their performances.
学习起来相对简单。初学者可以在练习两天后便开始他们的第一次山坡滑行之旅。
It is relatively easy to learn. Novices can hit their first slope after two days of practice.
当你练习时，你应该确保可以把故事控制在30秒内。如果不能，就减少细节再试一次。
While practicing your pitch, you should time yourself to make sure you can tell your story in 30 seconds. If you can't, cut down details and try again.
在镜子前再练习一次你准备好的答案。
每个周日在北海公园举行一周一次的流瑜伽的练习！
再一次强调，如果你尚未掌握这一体式的练习要领，不要独自练习，务必在老师指导下尝试。
But i will mention again if you are not master in this asana then don; t practice alone, must practice under your teacher's guidance.
这样一次又一次的练习，是为了训练你在瞄准的同时，收紧你的背菱形肌肉。
Once again your goal with this practice is to get to full draw position in order to begin aiming and tightening your rhomboid muscles.
瓦伦西亚第一次练习，在星期五早晨举行。
我等候，直到我在遇见我的朋友再一次之前对于玩而且唱的晚上回去爱尔兰而且进入练习。
I waited until I went back to Ireland and got into practice again before meeting my friends for an evening of playing and singing.
在一次上课时他问我每天练习多久。我说每天三四个小时。
During one of my lessons he asked how much practising I was doing.
我处置酬酢事业已有36年，只管即便一直在练习和利用英语，但还是第一次到英国常驻。
In my 36 years of diplomatic career, I have learned and used English, yet this is the first time for me to be actually posted in Britain.
他在去年末一次不幸的训练事件(译注：练习举重，双臂骨折)之后，现在他感觉身体很好，但这位18岁球员承认如果他要回到他的最佳状态，他需要打比赛。
Despite now feeling physically fit after his unfortunate training ground accident late last year, the 18-year-old admits that he needs to play games if he is to return to his best.
刘伟是在10岁的一次意外中失去了双臂，但他并没有因此而消沉，而是凭着超凡的毅力每天坚持7个小时的练习，一年内就达到了钢琴7级的水平。
Wei is 10 years old in an accident lost his arms, but he isn't a depression, but with extraordinary perseverance day 7 hours of practice, a year reached piano 7 levels.
莉莉又一次怒火万丈：“你哪只耳朵听到西弗说过要练习不可饶恕咒了，他只是在评论！
Li Li another furies ten thousand Zhangs:"You which ear hear west the Fu once say and practice to forgive to curse, he is just annotating on!"
我非常高兴能得到此奖金，虽然我在练习的时候已经打出过多次147，但在正式比赛中还是第一次。
I'm really happy to get that monkey off my back because I've made so many in practice over the years but have never been able to produce one in tournament play.
我非常高兴能得到此奖金，虽然我在练习的时候已经打出过多次147，但在正式比赛中还是第一次。
I'm really happy to get that monkey off my back because I've made so many in practice over the years but have never been able to produce one in tournament play.
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