单词:Yuda
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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
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
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
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
Nine people were confirmed dead and 300 people were injured after a strong earthquake rocking Japan's northernmost prefecture of Hokkaido early Thursday, local police and rescue officials said. Around 30 people still remained missing in the wake of t
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