How many people are aware that a dancer with the New York City Ballet typically wears out a minimum of two hundred pairs of toe shoes per year?
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Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
Whencarbonisaddedtoironintheproperproportions,theresultissteel.
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Formerly,intheUnitedStates,manynursesworkedasprivatedutynursesratherthaninhospitals.
Oneofthegreatestbreakthroughsforprofessionalwomencamein1973whenthefieldofbankingopenedupforthem.