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·提前预报大地震尽管人们一再被告知，地震很难预测，但仍有不少科学家在作这方面的探索研究。如两位美国的工程专家前些年就开始研究墨西哥的地震预报系统，他们希望这一系统能有助于地震活跃区的加里福尼亚州，即使能提前几秒钟预报地震也是好的。正是这宝贵的几秒钟往往能
Earthquake prediction in advance Although people have been repeatedly told that the earthquake is difficult to predict, but there are still many scientists in this area for exploration and study. For example, two American engineering experts started to study the earthquake prediction system in Mexico a few years ago. They hoped that this system could help the state of California in the earthquake-stricken area, even if the earthquake could be predicted a few seconds earlier. It is this precious few seconds can often