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They have no practical value in earthquake prevention. They may have practical value in earthquake prevention. They are certain to have practical value in earthquake prevention. The article does not say anything about their practical value in earthquake prevention.
1989年10月13日 1989年10月01日 1989年01月01日 1989年10月25日
did the earthquake happen the earthquake happened was the earthquake happened the earthquake was happened
Dangers of Earthquakes. Earthquake Belts and Prediction. Earthquake Prediction and Control. Earthquake Engineering in California.
1989年5月1日 1989年4月1日 1989年1月1日 1989年3月15日
September, 1989 in July 7, 1989 in November 4 on July 10, 1989
by this earthquake - stricken area this earthquake - stricken area was this earthquake - strcken area this earthquake - stricken area had been
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