2. 外语
  3. Some people say love makes the world go around. Others say it is not love: it’s money. Since the truth is that it is energy t

Some people say love makes the world go around. Others say it is not love: it’s money. Since the truth is that it is energy t

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问题    Some people say love makes the world go around. Others say it is not
   love: it’s money. Since the truth is that it is energy that makes the world go 【S1】______
   around. Energy is the currency of the ecological system and life becomes
   possible even when food is converted into energy, which in turn is used to 【S2】______
   seek more food to grow, to reproduce and to survive. In this cycle all life 【S3】______
   depends. It is fairly well-known that wild animals survive from year to year
   by eating as many as they can during times of plenty, the summer and fall, 【S4】______
   storing the excess, usually in the form of fat, and then using these reserves
   of fat to survive during the hard time in winter when food is scarce. But it is 【S5】______
   probably less well-known that even with their stored fat, wild animals spend
   less energy to live in winter than in summer. A good case in point is white- 【S6】______
   tailed deer. Like most wildlife, deer reproduce, grow and store fat in
   the summer and fall when there is plenty of nutritious food available. A
   physically mature female deer in the good condition who has conceived in 【S7】______
   November and was given birth to two fawns during the end of May and first 【S8】______
   part of June, must search for food for the necessary energy not only to meet
   her body’s needs but also to reproduce milk for her fawns. The best milk 【S9】______
   production occurs at the same time that new plant growth is available. This
   is good timing, because milk production is an energy consuming process—it
   requires a lot of food. The cost can be met unless the region has ample food 【S10】______
   resources.
【S5】
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