Unit 2 Welcome to the unit （ppt课件）-2022新牛津译林版《高中英语》必修第三册.pptx

1、Nature is kind of a loving mother,but also a butcher in cold blood.-Victor Hugo 大自然既是慈爱的母亲，也是冷酷的屠夫大自然既是慈爱的母亲，也是冷酷的屠夫Natural disasters are extreme,sudden events caused by environmental factors that injure people and damage property.What are natural disasters?自然灾害是由环境因素引起的对人造成伤害和财产损失的极端、突发事件。Lead-inwi

2、ldfire 野火tornado 龙卷风flood 洪水earthquake地震What can you see in the pictures?What natural disasters are mentioned in the video?Video timehttps:/ Plates moving underground can cause an earthquake,which is of the earths surface.When a volcano erupts,volcanic ash and even rocks escape through a large openi

3、ng at the top.A large amount of falling down a hill or mountain is called a landslide.a sudden shakinghot gases earth and rockWhat natural disasters are mentioned in the video?WELCOMEWELCOME01What other natural disasters do you know?https:/ 闪电闪电Hurricane飓风飓风Flood 洪水洪水Tornado 龙卷风龙卷风hail storm 冰雹冰雹风暴风

4、暴sink holes 地面塌陷地面塌陷Natural Disasterslandslide 山体滑坡山体滑坡mudslide 泥石流泥石流lahars 火山泥流火山泥流 Volcanic eruption火山爆发火山爆发Earthquake 地震地震sandstorm 沙尘暴沙尘暴glacier calvings 冰川崩解冰川崩解rogue waves 超级巨浪超级巨浪Tsunami 海啸海啸storm surge 风暴潮风暴潮Earthquake,any sudden shaking of the ground caused by the passage of seismic waves

5、through Earths rocks.Seismic waves are produced when some form of energy stored in Earths crust is suddenly released,usually when masses of rock straining against one another suddenly fracture and“slip.”地震，由地震波穿过地球的岩石而引起的地震，由地震波穿过地球的岩石而引起的地面的突然摇动。当地壳中储存的某种形地面的突然摇动。当地壳中储存的某种形式的能量突然释放时，地震波就产生了，式的能量突然释

6、放时，地震波就产生了，通常是当大量岩石相互拉紧时突然断裂和通常是当大量岩石相互拉紧时突然断裂和“滑动滑动”。Volcanic eruptions happen when lava and gas are discharged from a volcanic vent.The most common consequences of this are population movements as large numbers of people are often forced to flee the moving lava flow.Volcanic eruptions often cause

7、temporary food shortages and Lahar.当岩浆和气体从火山口排出时，当岩浆和气体从火山口排出时，火山爆发火山爆发就发生就发生了。最常见的后果是人口流动，因为大量的人常了。最常见的后果是人口流动，因为大量的人常常被迫逃离流动的熔岩流。火山爆发经常会造成常被迫逃离流动的熔岩流。火山爆发经常会造成暂时的食物短缺和暂时的食物短缺和火山泥流火山泥流。Lahar refers to flows of mud and rock debris that form on the slopes of volcanoes，which can carry huge particles a

8、nd weights as they float.Buildings and vehicles can be smashed,buried and washed away.火山泥流指的是在火山斜坡上生成的泥流和岩石碎块流，能以漂浮的方式携带巨大的颗粒和重物，建筑物和车辆可被粉碎、掩埋和冲走。An ice storm is a form of winter storm wherein cold and freezing rain is experienced.Ice storm is a natural disaster,which can cause damages and health ha

9、zards to mankind and livestock.冰暴冰暴是一种经历寒冷和冻雨的冬季是一种经历寒冷和冻雨的冬季风暴。冰暴是一种对人类和牲畜造风暴。冰暴是一种对人类和牲畜造成损害和健康危害的自然灾害。成损害和健康危害的自然灾害。A sandstorm is a strong wind that blows across the arid and semi-arid regions.It occurs due to the poor management of dry land and over-grazing of vegetation.沙尘暴沙尘暴是一种吹过干旱和半干旱地区的是一种

10、吹过干旱和半干旱地区的强风。它是由于对旱地管理不善和过度强风。它是由于对旱地管理不善和过度放牧植被造成的。放牧植被造成的。Hurricanes refer to a closed circulation system in the atmosphere that consists of strong winds and low pressure.The winds rotate clockwise in the southern hemisphere and counter clockwise in the northern hemisphere.A hurricanes is usually

11、 characterized by a low-pressure center with strong winds and spiral rain bands.飓风飓风是指大气中由强风和低气压组成的封闭循是指大气中由强风和低气压组成的封闭循环系统。南半球的风是顺时针旋转，北半球的环系统。南半球的风是顺时针旋转，北半球的风是逆时针旋转。飓风的特征通常是一个带有风是逆时针旋转。飓风的特征通常是一个带有强风和螺旋雨带的低压中心。强风和螺旋雨带的低压中心。Storm surge is due to the due to severe atmospheric disturbances,such as s

12、trong winds and air pressure change leads to the abnormal fluctuation,at the same time and astronomical tide(usually refers to the tide)superposition of circumstance,if the stack is strong low pressure high surge and astronomical tide of storm surge formation overlay will form a greater destructive

13、power.风暴潮风暴潮指的是，指的是，由于剧烈的大气扰动，如强风和气压骤变导致海水由于剧烈的大气扰动，如强风和气压骤变导致海水异常升降，同时和天文潮（通常指潮汐）叠加时的情况，如果这种异常升降，同时和天文潮（通常指潮汐）叠加时的情况，如果这种叠加恰好是强烈的低气压风暴涌浪形成的高涌浪与天文高潮叠加则叠加恰好是强烈的低气压风暴涌浪形成的高涌浪与天文高潮叠加则会形成更强的破坏力。会形成更强的破坏力。飓风，台风，旋风，龙卷风和风暴潮的差别飓风，台风，旋风，龙卷风和风暴潮的差别飓风和台风都是指风速达到飓风和台风都是指风速达到3333米米/秒以上的热带气旋，只是因发生的地域不秒以上的热带气旋，只是因发

14、生的地域不同，才有了不同名称。生成于同，才有了不同名称。生成于西北太平洋西北太平洋和和我国南海我国南海的强烈热带气旋被称为的强烈热带气旋被称为“台风台风”；生成于；生成于大西洋、加勒比海以及北太平洋东部大西洋、加勒比海以及北太平洋东部的则称的则称“飓风飓风”；而；而生成于生成于印度洋、阿拉伯海、孟加拉湾印度洋、阿拉伯海、孟加拉湾的则称为的则称为“旋风旋风”。飓风在一天之内就。飓风在一天之内就能释放出惊人的能量。飓风与龙卷风也不能混淆。后者的时间很短暂，属于能释放出惊人的能量。飓风与龙卷风也不能混淆。后者的时间很短暂，属于瞬间爆发，最长也不超过数小时。前者则在海上。瞬间爆发，最长也不超过数小时。

15、前者则在海上。风暴潮指由强烈大气扰动，如热带气旋（台风、飓风）、温带气旋等引起的风暴潮指由强烈大气扰动，如热带气旋（台风、飓风）、温带气旋等引起的海面异常升高现象海面异常升高现象。沿海验潮站或河口水位站所记录的海面升降，通常为天。沿海验潮站或河口水位站所记录的海面升降，通常为天文潮、风暴潮、（地震）海啸及其他长波振动引起海面变化的综合特征。文潮、风暴潮、（地震）海啸及其他长波振动引起海面变化的综合特征。destructive-adj.破坏性的 a destructive fire 大火烧毁了我的书。骄傲毁灭了她destruction n.n.破坏破坏,毁灭毁灭destroy v.破坏 引起毁坏的原因引起毁坏的原因The fire caused the destruction of my books.Pride was her destruction.19Why cant polar bears eat penguins?in the North Pole in the South Polepolar adj.极的/北极的/南极的 pole n.杆，柱；地极；截然相反的两极之一；