Natural Disasters-自然灾害
In the past hundred years, there have heen frequent natural disasters, such as floods, droughts, mud-rock flows, seismic sea waves, earthquakes, windstorms and the stretching of new deserts. The disasters have killed millions upon millions of people, destroyed countless homes, and wiped out numerous pieces of fertile land.
Now more and more people become aware that those disasters have much to do with what we have done to the earth. We have cut down too many trees in the forests,we have badly polluted the environment, we have shocked our own home-planet time and again with tremendously powerful explosions of nuclear bombs. As a result, climates have become abnormal, rainwater rushes down hillsides angrily, and the underground energy goes up to revenge itself on us.
The earth is our only home-planet. It is urgent for us to stop damaging it, and to do our best to protect it and make it a lovely place suitable to live in, for we have nowhere to go and survive except where we are now.

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　　突然、是不可预测的。自然灾害通常是剧烈的，其破坏力极大。持续时间有长有短。灾难包括了很多因素，它们会引起受伤和死亡，巨大的财产损失以及相当程度的混乱。一次灾难事件持续时间越长，受害者受到的威胁就越大，事件的影响也就越大。另一个影响灾难程度的主要特征，是人们是否获得了足够的预警。

Suddenly, is unpredictable. Natural disasters is usually fierce, with great destructive power. The duration of a long short. Disaster, including a lot of factors that would cause injuries and deaths, huge property losses and a considerable degree of confusion. A disaster and the longer the duration of the incident, the victims are the greater the threat, the greater the impact of the incident. Another impact of the disaster extent of the main features is that people are getting the adequate warning.

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　　naturaldisasters

inthepasthundredyears,therehaveheenfrequentnaturaldisasters,suchasfloods,droughts,mud-rockflows,seismicseawaves,earthquakes,windstormsandthestretchingofnewdeserts.thedisastershavekilledmillionsuponmillionsofpeople,destroyedcountlesshomes,andwipedoutnumerouspiecesoffertileland.
nowmoreandmorepeoplebecomeawarethatthosedisastershavemuchtodowithwhatwehavedonetotheearth.wehavecutdowntoomanytreesintheforests,wehavebadlypollutedtheenvironment,wehaveshockedourownhome-planettimeandagainwithtremendouslypowerfulexplosionsofnuclearbombs.asaresult,climateshavebecomeabnormal,rainwaterrushesdownhillsidesangrily,andtheundergroundenergygoesuptorevengeitselfonus.
theearthisouronlyhome-planet.itisurgentforustostopdamagingit,andtodoourbesttoprotectitandmakeitalovelyplacesuitabletolivein,forwehavenowheretogoandsurviveexceptwherewearenow.

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　　a flood
Do you know floods ? They are the No.1 natural killer . When a flood occurred , hourses were washed away , roads and villages were destoryed , crops were damaged and people were killed . It also caused huge economic damage . After a flood , many people donated money , food , clothes and so on through the Red Cross to send to the flooded areas . Floods are very the stuctive and horrible . So we need plant more trees to provent floods .