WeatherForecast-天气预报

　　Weatherforecastsareofgreathelptous.Inruralareas,farmersWshowmuchconcernabouttheweather.Theywanttoknowwhenitwillrain,whenitwillsnowandwhethertheircropsmaybeinjuredbyfrostorhail.Usuallytheweatherforecastscanhelpthemtolearntheinformationtheyneedbef.rehandandenablethemtoavoidheavylosses.Incities,peoplebenefitfromweatherforecasts.Theywillearlyumbrellasorraincoatswiththemastheygotoworkortoschool.Theywillchangetheirclotheswhenweatherchanges.Andweatherforecastsmeanevenmoretopilotsofairplanes,driversofcars,captainsofshipsandmilitaryleaders.

　　Usuallyweatherforecastsarecorrect,andthereforetheyenjoythetrustofmostpeople.Butweatherisaffectedbyalotoffactorsandisveryhardtobeforecastveryexactlyeachtime.

　　Wearegratefultothosewholetusknowtheweatherinadvance,fortheyworkdayandnighttocollectandanalyzevariousdata.Someofthemhavetodotheirjobatobservationpostsinhighmountainsinterriblesurroundingsforworkingandliving.