Alligators still exist in some of the dank 潮湿 swamps and bayous小海湾 of Alabama's coastal regions.
A、weirdly古怪的fascinatingD
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Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.
Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.
