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标题:Operations on the Brain
正文: It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes.
Dr. White thinks doctors should try to make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctors a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs. Then he operated on them. He made the monkeys' blood go through a machine which cooled the blood, and then sent the blood back to the monkeys' brains. When the brain temperature was 50 degrees, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they were before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
Operate 动手术，操作，运转
Operate on one’s mind在思想上产生影响
Operate on/upon sb. 给某人动手术
The lift doesn’t operate properly.这台电梯运转不正常。
Blood 血、血液、家族
Half blood 同父异母或同母异父的关系
High blood 勇气，贵族血统
Hot blood 激愤
Make one’s blood boil使发怒
Out for one’s blood要某人的命
注：文章中的50度不是摄氏度。
摄氏度与华氏度的转换：
华氏度＝32＋摄氏度×1.8
摄氏度＝（华氏度－32）÷1.8
“华氏温标”是经验温标之一。在美国的日常生活中，多采用这种温标。规定在一大气压下水的冰点为32度，沸点为212度，两个标准点之间分为180等分，每等分代表1度。华氏温度用字母“F”表示。它与摄氏温度（C）和华氏温度（F）之间的换算关系为F=9/5c+32, 或C=5/9(F-32)

听力（14）

听力（14）

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