In the northeastern United States, it rains intermittently 间歇地 throughout the spring.
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DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.
Alllivingorganisms,regardlessoftheiruniqueidentity,havecertainbiological,chemical,andphysicalcharacteristicsincommon.
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
Someseaurchins海胆havevenomous(toxin)spines
Formerly,intheUnitedStates,manynursesworkedasprivatedutynursesratherthaninhospitals.