6The United Nations
听写五十
Living Space
How much living space does a person need? / What happens when his space needs are not met? / Scientists are doing experiments on rats / to try to determine the effects of overcrowded conditions on man. / Recent studies have shown / that the behavior of rats is greatly affected by space. / If rats have enough living space, / they eat well, sleep well and produce their young well. / But if their living conditions become too crowded, / their behavior and even their health change obviously./ They can not sleep and eat well, / and signs of fear and worry become clear. / The more crowded they are, / and more they tend to bite each other / and even kill each other. / Thus, for rats, populations and violence are directly related./ Is this a natural law for human society as well? / Is enough space not only satisfactory, / but necessary for human survival? / These are interesting questions.
