请教GWD--16--36的一道题

zhouyangweiwei

36.。 The chemical adenosine is released by brian cells when those cells are active. Adenosine then binds to more and more sites on cells in certain areas of the brain.
           当脑细胞活跃的时候会释放一种AD的化学因子吧。 当清醒时， AD被释放得越多，然后与越来越多的脑细胞结合在一起。
        as the total amount released gradually increases during wakefulness. During sleep, the number of sites to which adenosine is bound decreases.
             但睡觉时， AD着床的脑细胞减少。
        Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.
              所以，研究人员就假设： 那些被AD着床的脑细胞达到累计到一定程度后就引发人们睡觉。

       我先试着来翻译一下， 这个句子的CONCLUSION是最后一句 。 问的是支持他们的假设。

   Which of the following, if true, provides the most support for the researchers' hypothesis?

    A: Even after long periods of sleep when adenosine is at its lowest concentration in the brain, the number of brain cells bound with adenosine remains very large.
讲：即使在AD最少，长时间的睡觉后， 但与AD连结的脑细胞还是很多。
   B: Caffeine , which has the effort of making people remain wakeful, is known to interfere with the binding of adenosine to sites on brain cells.
   讲： 咖啡因---一种能帮助人们清醒的东西， 已知，它会影响AD与脑细胞的连接。
  C,  Besides binding to sites in the brain, adenosine is known to be involved in biochemical reactions throughout the body.

  D, Some areas of the brain that are relatively inactive nontheless release some adenosine.
C，D明显不对，因为OUT OF SCOPE.
  E, Streess resulting from a dangerous situation can preserve wakefulness even when brain levels of bound adenosine are high.
讲：当与AD连接的脑细胞仍然还很多时，来自危险中的压力可以使人保持清醒。


    原谅楼主的破烂翻译，但每次做到这样的题目就很抓狂，还有就是那些小白鼠的什么什么病菌，然后抗体之类的，都会被绕很久，都推不出逻辑链 。

但还是不是很明白， 这一题讲的是： 与AD结合的脑细胞在清醒时多，睡觉时少。但结论却说：是与AD结合的脑细胞达到一定程度后让人睡觉。

反正就是一句话： 没有搞懂啊。 求高手指教。

zhouyangweiwei

自己顶一下~~~~~~！

penguinvino

亲，我也是这道题没看懂，但是看了你的翻译之后懂了（开始还以为你是来解释这道题的。。。），你翻译的很对呀，“ 那些被AD着床的脑细胞达到累计到一定程度后就引发人们睡觉。”B选项说“咖啡因会影响AD与脑细胞的连接”所以就起到了不让AD累计的作用了吧。。。。我是这么理解的。。。。

zhouyangweiwei

The chemical adenosine is released by brain cells when those cells are active. Adenosine then binds to more and more sites on cells in certain areas of the brain  as the total amount released gradually increases during wakefulness. During sleep, the number of sites to which adenosine is bound decreases. Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.

很久之后，再来做一下这题： C：it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep－－A积累到了一定程度才引发了睡觉。
                                        P: when brain cells are active, A is released. ---More and more A binds to brain when awake. When sleep--A decrease.

就是说A这个东西是在脑细胞活跃的时候才产生，醒的时候很多，睡觉的时候就很少。--所以科学角就假设说是因为太多了A被产生才引发睡觉。
   
题目问支持。。 再来读选项：
A，Even after long periods of sleep when adenosine is at its lowest concentration in the brain, the number of brain cells bound with adenosine remains very large
   这个选项明显没有支持。Brain cells bound with A are large when someone's sleep不能解释是不是睡眠有A积累太多产生的。
B,  Caffeine , which has the effort of making people remain wakeful, is known to interfere with the binding of adenosine to sites on brain cells.
   说用于帮助人们保持清醒的咖啡，已知会影响A与BC的BINDING。 这个答案先留着，说明了A与BC的关系能影响睡眠。再继续看其他选项
C,  Besides binding to sites in the brain, adenosine is known to be involved in biochemical reactions throughout the body.
   这是个典型的GMAT选择中常出现的错误选项样子，A与其他的反应根本就不是本题讨论的范围
  D, Some areas of the brain that are relatively inactive nontheless release some adenosine.
   说SOME，即使不ACTIVE也会释放A, ---1, 即使SOME是真的，也不影响全面。 2，文章讨论的是关于是不是A到达一定程度后引发睡觉。与一部分不释放没关系
E, Stress resulting from a dangerous situation can preserve wakefulness even when brain levels of bound adenosine are high.
  在讲一种特例，当处于危险中，压力会让人保持清醒，（即使A在BC的着床很高）。 没有支持是否是因为A的增多而睡觉。

所以答案选B---