InthenortheasternUnitedStates,itrainsintermittently间歇地throughoutthespring.
A、steadilyThefuturesurvivalofthebaldeagleisstillanimportantAmericanecologicalconcern.
The fear of smallpox, which terrorized the eighteenth century, has no analogy(likeness) today.
EllaGrasso,electedgovernorofConnecticutin1974,supportedtheenactment(given,granted)ofafreedom-of-informationlaw.
Bats fly, rather than glide, and thus are the only mammals capable of true flight.
When carbon is added to iron in the proper proportions , the result is steel.