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Five things you should know about earthquakes. 关于地震你应该知道的5点 Number one, an earthquake occurs when two blocks of the Earth slip fast each other. Now, for most of the time, those blocks are together with friction. But they are bui
CNN美国有线新闻2017年11月
Tornados are one of the most frightening weather phenomena on our planet. Not only are they unique in how they form, but also in how they are measured . A tornados intensity is defined by the Enhanced Fujita Scale. On this scale, the intensity of the
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Predicting Earthquakes Can earthquakes be predicted? Scientists are working on programs to predict where and when an earthquake will occur. They hope to develop an early warning system that can be use
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Can earthquakes be predicted? Scientists are working on programs to predict where and when an earthquake will occur. They hope to develop an early warning system that can be used to forecast earthquakes so that lives can be saved. Earthquakes are the
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BEIJING, July?30 (Xinhuanet) -- At 6:00 a.m. today, typhoon Saola was centered about 410 km southeast of Hualian, Taiwan province with maximum wind force up to scale 12 near its center. Saola is forecasted to move north by west at speed of 5-10 km pe
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He had discovered the boundary between the crust and the layer immediately below, the mantle; 他发现地壳与下面一层即地幔的界线， this zone has been known ever since as the Mohorovicic discontinuity, or Moho for short. 此后，这个区
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