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。 2. 1986年看见哈雷慧星的千百万人当中,有多少人能长寿到足以目睹它在二十一世纪的回归呢?
1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn。 1.美洲羚羊,或称叉角羚,是该大陆典型的草原动物。
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3. Anthropologists have discovered that fear, happiness, sadness, and surprise are universally reflected in facial expressions。 3.人类学家们已经发现,恐惧,快乐,悲伤和惊奇都会行之于色,这在全人类是共通的。