英语翻译
1.Petroleum,naturalgasandcocalcomefromplantsthatlived330millionyearsago.
2.Althoughthereexistonlyabout90elementsinnature,theycombinetoformthousandsofdifferentsubstancesintheworld.
3.Nobel'originallegacyofninemilliondollarswasinvested,andtheinterestonthissumisusedtodayfortheawardswhichvaryfrom$30000to$125000.
4.Fourscoreandsevenyearsagoourfathersbroughtforthonthiscontinentanewnation,conceivedinliberty,anddedicatedtothepropositionthatallmenarecreatedequal.
5.Inpractice,arotorweighingabout10tonsandrotalingat3000r.p.m.maybesowellbalancedthatthemotion,exceptforsound,isjustperceptible.