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　　13. memory deficits：记忆衰退

　　14. … the intriguing possibility that improving glucose tolerance could reverse some age-associated problems in cognition：令人兴奋的可能性，即不断改善葡萄糖容许量可以完全改变对某些与年龄相关的认知问题。

　　15. keep glucose levels in check：限制葡萄糖水平。 in check：在控制中，被阻止。

　　练习：

　　1. Which of the following statements is nearest in meaning to the sentence "To sleep. Perchance to file?"? A Does brain arrange memories in useful order during sleep?

　　B Does brain have memories when one is sleeping?

　　C Does brain remember files after one falls asleep?

　　D Does brain work on files in sleep?

　　2. What is the result of the experiment with rats and mice carried out at Rutgers University?

　　A The electrical activity is emanating from the somatosensory neocortex.

　　B Oscillations in brain waves are from hippocampus.

　　C Somatosensory neocortex and hippocampus work together in memory consolidation.

　　D Somatosensory neocortex plays it primary role in memory consolidation.

　　3. What is the relation of memory to glucose tolerance, as is indicated by a research mentioned in paragraph 4?

　　A People with poor memory have high glucose tolerance.

　　B People with good memory have low glucose tolerance.

　　C Memory level has nothing to do with glucose tolerance.

　　D The poorer the memory, the poorer glucose tolerance.

　　4. In what way is memory related to hippocampus shrinkage?

　　A There is no relation between memory and hippocampus shrinkage.

　　B The more hippocampus shrinks, the poorer one's memory.

　　C The more hippocampus shrinks, the better one's memory.

　　D The less hippocampus shrinks, the poorer one's memory.

　　5. According to the last paragraph, what is the ultimate reason for going to the gym?

　　A To prevent hippocampus shrinkage.

　　B To control weight.

　　C To exercise.

　　D To control glucose levels.

　　答案与解释 :

　　1. A文章第一段告诉我们，科学新发现进一步支持了一种理论，即，当人体进入睡眠状态时，大脑对在白天形成的记忆进行组织和储存。 To sleep. Perchance to file?见注释 1和注释 2。

　　2. C 第二段告诉我们，科学家分析了老鼠的脑电波，尤其是从 somatosensory neocortex和 hippocampus两个区域发出的脑电波。该段是后两句指出，这两个大脑区域的活动是互相作用的。第二段并没有说 somatosensory neocortex或 hippocampus起主导作用。

　　3. D 该段倒数第二句提供了答案。

　　4. B 第四段的后一句中 their brain scans，指上句中的 subjects

　　5. D 锻炼身体和体重控制能保持葡萄糖水平，闲此，去健身房就有了另外一个理由。