【英语翻译Unit10climateandpeople’slifeManhasbeenonearthaboutonemillionyears.Hehasmanagedtoliveonverypartoftheplanet,eventhoughtsomeclimateshavemadelifemoredifficultthanothers.Sometimesmanmoved;sometimesheremai】
英语翻译
Unit10climateandpeople’slife
Manhasbeenonearthaboutonemillionyears.Hehasmanagedtoliveonverypartoftheplanet,eventhoughtsomeclimateshavemadelifemoredifficultthanothers.Sometimesmanmoved;sometimesheremainedandenduredthediscomforts.Wheremanhasremained,heapparentlyhasundergonesomephysicalchangesthathavehelpedhimadapttohisclimate.
Itisthoughtthatdifferencesinskincoloraretheresultofclimaticadaptation.Peoplefromhotclimatesgenerallyhaveburningblackorbrownskinthatresiststhesun’sburningrays.Thelightestskinnedpeoplegenerallycomefromcolderregions,wheretheyhavelessexposuretothesun.peoplewithskinofothercolor,suchasyellow,red,andolive,generallycomefromareaswheretheyhavealsohadtoadapttootherclimates.
Man’ssizealsoseemstovaryaccordingtoclimate.Peoplelivingincolderregionsaregenerallylargerthanthoselivinginhotterones.Thisdifferencemightbeexplainedbythefactthatbigpeoplehavelessskincomparedtohisweight,theeasieritisforhimtokeepwarm.
Aspartofthenaturalenvironment,climategreatlyaffectshumanactivities.Climatehassignificanteffectonagriculture.Climaticfactorssuchasthelengthofthegrowingseason,thetotalamountofrainfall,andthedailyandseasonalchangesintemperaturerestrictthekindsofcropsthatcanbegrown.
Climatealsoaffectstransportation.Inareasoffrequentstorms,transportationisoftensloweddownorinterrupted.Watertransportationinmanyareasisimpossibleiftheriverisfrozen.Landtransportationmaybeblockedbyheavysnowfall.Airtravelespeciallyisaffectedbystormyweather.
Majorconcentrationsofpopulationintheworldareinthehumid,warmerregions,wherethedevelopmentofagricultureisnotrestrictedbypoorclimaticconditions.Fewerpeopleliveinareaswithverydry,verywet,orverycoldclimates.However,withthedevelopmentoftechnology,suchasairconditioningandcentralheating,peoplearebecominglessconfinedtoso-calledfavorableclimates.
Itistruethatmanchangeshislivinghabitsinordertoadjusttoclimate,butclimatechangeshis
aswell,thoughmoreslowly.Manadaptsconstantlyto