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Basically，a tsunami ls caused by some un—der sea disturbance(扰动)after which follows aseries of water waves，The deadly waves arecaused by the move of a large volume of water,usually an ocean，However，tsunamis can alsooccur in large lakes，Basically，tsunamis can begenerated when the sea floor suddenly andquickly moves and displaces water，
从根本上来说，海啸是由海底扰动引发的，并伴随有滚滚涌来的巨大海浪。这些破坏力巨大的海浪是由大量水体乃至海洋运动形成的。然而，在大型湖泊中海啸也有可能发生。实际上，只要海床发生急剧变动并且导致水体波动，便会引发海啸。
Why are。Fsunamis sO deadly?
为什么海啸是破坏力那么大?
1，Difficult t0 predict and detect：This isbecause they have a small wave height offshore，and a very long wavelength foften hundreds ofkilometers long)，For this reason they can passunnoticedly at sea,forming only a slight swell(波浪起伏)usually about 12 inches above thenormal sea surface，Obviously，boats often don'tnotice a tsunami’s coming when out at sea，
1.预测、监测难。在近海区域，海啸呈现的波高虽小，其波长却可达几百公里。正因为如此，海浪便可以不知不觉穿越海洋。其引发的海面起伏，常常只比正常海面高12英寸(1英寸=2.54厘米)。很明显，在这种情况下，远海的船只通常是无法察觉海啸的到来的。
2.Size and speed：These huge waves are sodangerous because they grow in height andspeed as they reach shallower(更浅的)water,with a loud sound，Due to the large volumes ofwater and the high energy involved(tsunamiwaves can travel at a speed of 500 kilometersper hour)，tsunamis can destroy(摧毁)coastalregions，
2.速度陕，规模大。这些巨大的海浪之所以具有如此大的破坏力是因为他们在到达浅海地区后，速度急剧提升，波高剧增，以摧枯拉朽之势汹涌而来。由于海啸水量极大、能量惊人(时速可达500公里每小时)，因此它可以摧毁沿海区域。
Earthquakes，volcanic eruptions，landslidesand other underwater explosions all may cause atidal wave or tsunami，A tsunami can also occurin any tidal state and even at low tide it canstill drown(淹没)coastal areas，About 80％oftsunamis occur in the Pacific Ocean，Tsunamisoccu~ed often in Japan；nearly 195 events havebeen recorded，
任何地震、火山爆发、滑坡以及其他水下爆炸都有可能引起潮波或者海啸。其实，任何潮汐起伏，都有可能引发海啸，但就算是最小的海啸也可能会淹没沿海区域。80％的海啸发生在太平洋海域。海啸在日本的发生频率也颇高，据记载有大约195次。
Who can forget the most devastating(毁灭性的)2004 Asian tsunami，which killed almost230,000 people in e]even countries across theIndian Ocean，The recent tsunami in Japan isthe most powerful since Japan started keepingrecords 140 years ago and literally thousands ofpeople are feared dead，The amount of destruc—tion is unbelievable，
谁能忘记那最具毁灭性的2004年东南亚海啸?在印度洋海域，11个国家就有230 000人死亡。最近，日本发生了史上最强烈的海啸，所伤人数高达上千人，所造成的毁坏不可预料。
Hopefully，with each~agedy，scientists canlearn more about early detection and warningsystems，There is no doubt about it：when moth—er nature shakes her body，we are at her mercy，
但愿，这些惨剧可以促使科学家们开发出海啸的探测和警报系统。但毫无疑问的是，地球母亲摇一摇，我们只能静候其悲悯。
从根本上来说，海啸是由海底扰动引发的，并伴随有滚滚涌来的巨大海浪。这些破坏力巨大的海浪是由大量水体乃至海洋运动形成的。然而，在大型湖泊中海啸也有可能发生。实际上，只要海床发生急剧变动并且导致水体波动，便会引发海啸。
Why are。Fsunamis sO deadly?
为什么海啸是破坏力那么大?
1，Difficult t0 predict and detect：This isbecause they have a small wave height offshore，and a very long wavelength foften hundreds ofkilometers long)，For this reason they can passunnoticedly at sea,forming only a slight swell(波浪起伏)usually about 12 inches above thenormal sea surface，Obviously，boats often don'tnotice a tsunami’s coming when out at sea，
1.预测、监测难。在近海区域，海啸呈现的波高虽小，其波长却可达几百公里。正因为如此，海浪便可以不知不觉穿越海洋。其引发的海面起伏，常常只比正常海面高12英寸(1英寸=2.54厘米)。很明显，在这种情况下，远海的船只通常是无法察觉海啸的到来的。
2.Size and speed：These huge waves are sodangerous because they grow in height andspeed as they reach shallower(更浅的)water,with a loud sound，Due to the large volumes ofwater and the high energy involved(tsunamiwaves can travel at a speed of 500 kilometersper hour)，tsunamis can destroy(摧毁)coastalregions，
2.速度陕，规模大。这些巨大的海浪之所以具有如此大的破坏力是因为他们在到达浅海地区后，速度急剧提升，波高剧增，以摧枯拉朽之势汹涌而来。由于海啸水量极大、能量惊人(时速可达500公里每小时)，因此它可以摧毁沿海区域。
Earthquakes，volcanic eruptions，landslidesand other underwater explosions all may cause atidal wave or tsunami，A tsunami can also occurin any tidal state and even at low tide it canstill drown(淹没)coastal areas，About 80％oftsunamis occur in the Pacific Ocean，Tsunamisoccu~ed often in Japan；nearly 195 events havebeen recorded，
任何地震、火山爆发、滑坡以及其他水下爆炸都有可能引起潮波或者海啸。其实，任何潮汐起伏，都有可能引发海啸，但就算是最小的海啸也可能会淹没沿海区域。80％的海啸发生在太平洋海域。海啸在日本的发生频率也颇高，据记载有大约195次。
Who can forget the most devastating(毁灭性的)2004 Asian tsunami，which killed almost230,000 people in e]even countries across theIndian Ocean，The recent tsunami in Japan isthe most powerful since Japan started keepingrecords 140 years ago and literally thousands ofpeople are feared dead，The amount of destruc—tion is unbelievable，
谁能忘记那最具毁灭性的2004年东南亚海啸?在印度洋海域，11个国家就有230 000人死亡。最近，日本发生了史上最强烈的海啸，所伤人数高达上千人，所造成的毁坏不可预料。
Hopefully，with each~agedy，scientists canlearn more about early detection and warningsystems，There is no doubt about it：when moth—er nature shakes her body，we are at her mercy，
但愿，这些惨剧可以促使科学家们开发出海啸的探测和警报系统。但毫无疑问的是，地球母亲摇一摇，我们只能静候其悲悯。