【導(dǎo)讀】haveshowninterestinthisnewandunusualsport.Butthoughaircyclistsmaylearnhowtoflyovershortdistances,andmay,eventually,evengetacrosstheEnglishChannel,itisdoubtfulwhethertheywilevercycleacrosstheAtlantic.Lesson67Volcanoes火山HarounTazieffthePolishscientist,hasspenthislife-timestudyingactivevolcanoesanddeepcavesinalpartsoftheworld.In1948,hewenttolakeKivuintheCongotoobserveanewvolcanowhichhelaternamedKitur