1.Typical of the grassland dwellers of the continent is the American antelope, or pronghorn.美洲羚羊，或稱叉角羚，是該大陸典型的草原動(dòng)物。

　　2.Of the millions who saw Haley’s comet in 1986, how many people will live long enough to see it return in the twenty-first century.1986年看見(jiàn)哈雷慧星的千百萬(wàn)人當(dāng)中，有多少人能夠長(zhǎng)壽到足以目睹它在二十一世紀(jì)的回歸呢？