英语翻译Itisnaturalthatchildrenarecurious(好奇的)abouttheworldaroundthem.Forexample,theywanttoknowhowtheirheartsbeat.Theywanttoknowwhytheoceanwatertastessalty.Aschildrengrowup,theybecomecuriousaboutdif
英语翻译
Itisnaturalthatchildrenarecurious(好奇的)abouttheworldaroundthem.Forexample,theywanttoknowhowtheirheartsbeat.Theywanttoknowwhytheoceanwatertastessalty.Aschildrengrowup,theybecomecuriousaboutdifferentkindsofthings.Whentheyarebabies,theyareinterestedinthepartsoftheirbodiesandinthesmilesoftheirmothers.Theybecomeinterestedinthephysicalworldaroundthem:theplants,theanimals,thesky.Later,theybecomeinterestedinthethingsthatpeoplehavemade:wheels,bicycles,cars.Andwhentheyareadults,theircuriositycontinues.Sometimesthiscuriosityleadstoacareer(生涯,职业)inscience.Scientistsspendtheirlivestryingtofindoutabouttheworld.Thosewhoworkwiththeearthsciencesstudytheearth,theoceans,andthesky.Otherscientistswhostudylivingthingsworkwiththebiologicalsciences.Athirdgroupofscientistsstudythephysicalsciences,egphysics,chemistry.Thesescientistshavealreadydiscoveredalotaboutourworld.Forexample,theytelluswhyyourheartbeatsfastwhenyourun.Theysaythatwhenyouarequiet,yourheartnormallybeatssixty-fiveorseventy-fivetimesaminute.Yourheartisapump(泵)thatpumpsbloodtoallpartsofthebody.Thebloodcarriesoxygenandnutrition.Whenyourun,yourmusclesworkveryhardandusethenutritionthatthebloodcarriestothem.Themusclesneedoxygen,too.Soyourbrainsendsasignaltotheheart.Thesignalmeansthatthemusclesneedmorenutritionandoxygen.Thentheheartbeatsfastandsendsbloodquicklytothemuscles.Itmaybeat90to140timesaminute.Ofcourse,scientistscannotanswerallofourquestions.Ifweask,“Whydoestheoceanwatertastesalty?”Scientistswillsaythatthesaltcomesfromrocks.Whenarockgetsveryhotorverycold,itcracks.Rainfallsintocracks.Therainthencarriesthesaltintotheearthandintotherivers.Theriverscarrythesaltintotheocean.Butthenweask,“Whathappenstothesaltintheocean?Theoceandoesnotgetsaltiereveryyear.”Scientistsarenotsureabouttheanswertothisquestion.Weknowalotaboutourworld,buttherearestillmanyanswersthatwedonothave,andwearecurious.