naturaldisaster自然灾害剖析.pptVIP

Natural disaster ——From group three Fire, Water ... … and Snow Sea Wall Troubled Water In a Jam Lower Manhattan Laid Low Calm After the Storm Beach, Before Landfall A tsunami is a series of water waves. It is caused by the displacement of a large volume of a body of water, such as an ocean. ——This is a picture about the tsunami in Japan. As we knew, a tsunami happened in Japan because of the earthquake. As a result, it caused a series of problems. It was in Japan that a large number of people lost their life. And many buildings were destroyed. It was the natural disaster that people could not hold back. An unusual phenomenon(现象) about the tsunami in Japan!!! Mariners who escaped the onslaught of the tsunami soon had to contend with another peril - the appearance of vast whirlpools off the coast of Japan. 刚刚逃过滚滚而来的巨大海啸浪涛的船员还来不及喘息，就又将面对另一处险象环生的挑战——在日本近海岸线上出现的巨大漩涡。 The powerful vortices appeared yesterday morning when the oceans, swollen by the vast surge of water, began to recede. The powerful vortices appeared yesterday morning when the oceans, swollen by the vast surge of water, began to recede. 在广大淹水地区出现“退水”的情况下，出现威力强劲的大漩涡。 　 As the water levels fell, whirlpools hundreds of yards wide appeared, sucking everything into the themselves and creating new danger for passing boats. 随着水位的下降，漩涡的范围扩张到几十码的区域，它毫不留情滴将周围的所有一切都吸入其内，这又给过往的船只造成了新的危险。 Whirlpools are created by rising and falling water - and are a common feature of tsunamis. But they are rarely as spectacular - or as well photographed. 漩涡是由于水涨水退的变化而引起的，是海啸所常常伴随的现象，但拍摄到如此大规模的海啸，的确实属少见. Originally, the interior of the earth is filled with hot magma. Under tremendous pressure, the hot magma will break through the earths crust and spouts out, causing the volcano. 原来，地球内部充满了热的岩浆。在巨大的压力下，滚烫的岩浆会冲破地壳，喷出，造成火山。 Harm 1.Cause great bad impact on the global climate 2. Ash and rain mixed form mudslides（泥石流） 3. Ash can cause respiratory diseases（呼吸道疾病） Benefits 1. Many of the volcanic m