DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.
A、eagerCreamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
Whencarbonisaddedtoironintheproperproportions,theresultissteel.
Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
