英语翻译
Theusefulsea
IfyoulookedatthePacificfromaspace-capsule(太空舱),youmightthinkthattheworldwasallwater.Youwouldhardlybeabletoseeanylandatall.Watercoversmostoftheearth’ssurface.
Theseacontainslargenumbersofsubstances,besidescommondifferentmaterials.Forinstance,outofacubic(立方)mileofwateryouwouldgetninety-fourtonsofsilversandthreetonsofgold!Ifitwerepossibletodothis,itstillwouldn’tbeworththetrouble.Itwouldcostmoretogettheseprecious(宝贵的)metalsthantheyareworth.Buttheseaprovidesuswithagreatmanymaterialswhichwecangeteasilyandwhichweusealot.Forinstance,weusehugequantitiesofsandinindustrytomakeglass,detergentsandcements(清洁剂和水泥).Besidesmaterialslikesaltandsand,wegetagreatdealoffoodfromthesea.Onedaywemayevenhaveunderseafarms.Wehavehardlybeguntoexplorethesea.Insomewaysitislessfamiliar(熟悉的)thanouterspace.
求高手翻译,在此先谢过了.翻译器的请不要回答.