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97.每次我听说体育运动能够在国家间建立起友好感情，说世界各地的普通人只要能在足球场或板球场上　　 98. It is impossible to say simply for the fun and exercise: as soon as the question of pr98.没有可能仅仅为了娱乐或锻炼而运动：一旦有了问题，一旦你觉得你输了你和你所属团体会有失体面　　 99. It has been found that certain bats emit squeaks and by receiving the echoes, they can99.人们已经发现，某些蝙蝠发出尖叫声并靠接受回响来锁定和避免障碍物——或者找到它们赖以为生的　　 100. As the time and cost of making a clip drop to a few days and a few hundred dollars, e100.随着芯片制造时间和费用降低到了几天和几百美元，工程师们可能很快可以任他们的想象驰骋而不