1.TypicalofthegrasslanddwellersofthecontinentistheAmericanantelope,orpronghorn.1.美洲羚羊，或称叉角羚，是该大陆典型的草原动物。2.OfthemillionswhosawHaley’scometin1986,howmanypeoplewilllivelongenoughtoseeitreturninthetwenty-firstcentury.2.1986年看见哈雷慧星的千百万人当中，有多少人能够长寿到足以目睹它在二十一世纪的回归呢？3.Anthropologistshavediscoveredthatfear,happiness,sadness,andsurpriseareun...
