Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
A、understandingThefearofsmallpox,whichterrorizedtheeighteenthcentury,hasnoanalogy(likeness)today.
WhileBillieHolidaydidnotinventthemusiccalled"theblues",shemostassuredlyhelpedpopularizeit.
Creamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
ThefuturesurvivalofthebaldeagleisstillanimportantAmericanecologicalconcern.
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
