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When a baby's head is stuck in the birth canal for an extended period of time, it cuts off the blood supply to the woman's surrounding organs.
VOA: special.2010.08.09
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Clearly, important information is to be conveyed to students from people who settle in the fields for a long period of time.
显然，对某个领域,进行长时间研究的学者,会将重要的信息,传达给学生。
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A cohort study means you take the same group of people and follow them every five years for that period of time.
定群研究意味着你只有一组研究对象,然后在研究期间每五年进行一次记录数据
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Now here are some differences: the older patients were given adjuvant chemotherapy in weaker doses and for a shorter period of time.
VOA: standard.2010.03.18
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If I can run the gel for some period of time, run the electrical field, spread it out.
我将凝胶通电一段时间后,在电场作用下,就会分散开来
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He was very hurt by the strike, which shut down operations for quite a period of time."
VOA: standard.2010.02.26
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He has data for a very long time period, 1802 to 2006, for the U.S.
他的数据是采用美国从1802年到2006年，相当长的一段时间。
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His research shows that those taking the medications for more than four years have a higher risk of a fracture than people taking the drugs for a short period of time.
VOA: standard.2010.03.14
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In the same way that being a child is a phase you can go through for a period of time and then cease to be.
就像是作为儿童存在一样也是一个阶段,会经历一段时间而后停止。
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The style of warfare that emerges in this period, apparently for the first time, is what we call the hoplite phalanx and each half of that needs to be explained.
显然,这个时期第一次出现了,一种独特的战争形式,那就是重步兵方阵,我来给大家分别解释下这两个词
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The term is on the board and it's a good example of syncopation sort of jumping in ahead of time cutting off the beat, getting in there ahead of time and throwing off the metrical balance for a very short period of time.
这个词已经写在白板上,这是个非常典型的切分音的例子,它提前跳入,切分节奏,提前介入,并在非常短的时间里,打破拍子的平衡
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It was implanted into the first patient, a gentleman in Kentucky, and he stayed alive for a period of time with this device replacing his heart.
第一个植入这个人工心脏病人是,住在肯塔基州的一位先生,他在移植手术后,存活了一段时间
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They can be on store shelves for a long period of time, and that has to do with the economics of food, especially food available to the poor, which we'll discuss later.
因此可以在商品货架上销售很长一段时间,这也与食物的经济学价值有关,特别这类食物穷人也买得起,这个我们以后会讨论
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Now the nice thing about this is that the degradation mechanisms seem to persist for some period of time, beyond the time at which you deliver the double stranded RNA; whereas, obviously, this mechanism here is only going to exist for as long as the anti-sense sequence is present.
而好消息是降解过程会持续一段时间,比你转入双链RNA的时间要长,但是,这种机制只会在,有反义链的时候发挥作用
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