【英语翻译Themostimportantuseofdrifting(漂流)bottlesistofindoceancurrents.Whenthepositionanddirectionofcurrentsareknown,shipscanusetheforwardmovementofacurrentorstayawayfromcurrentsthatwouldcarrythemofftheir】

　　英语翻译

　　Themostimportantuseofdrifting(漂流)bottlesistofindoceancurrents.Whenthepositionanddirectionofcurrentsareknown,shipscanusetheforwardmovementofacurrentorstayawayfromcurrentsthatwouldcarrythemofftheircourse.BenjaminFranklinwasoneofthefirsttousebottlesinthestudyofcurrents.HewonderedwhyBritishmallshipsneededaweekortwolongerthanU.S.shipsneededinordertocrosstheAtlanticOcean.FranklinthoughttheGulfStream(墨西哥湾流)mightexplainthisdifference.

　　FranklintalkedwithcaptainsofU.S.ships.HefoundthattheykneweachturnoftheGulfStream.Theyusedthecurrentineverypossibleway.Fromhistalkswiththecaptains.FranklinmadehisfirstmapoftheGulfStream.Thenhecheckedhismapbyusingsealed(密封的)bottles.Themapthathefinallymadeisstillused,withonlyafewchanges,today