新托福iBT词汇分类突破 – Unit 157

by 李笑来 on 2009/12/08

Mercury is surprisingly dense, apparently because it has an unusually large iron core. With only a transient atmosphere, Mercury has a surface that still bears the record of bombardment by asteroidal bodies early in its history. Venus has a carbon dioxide atmosphere 90 times thicker than that of Earth, causing an efficient greenhouse effect by which the Venusian atmosphere is heated.

  • dense [dens] adj.密度大的
  • iron core [ˈaiən - kɔ:] n. 由铁组成的核
  • transient [ˈtrænziənt] adj. 瞬间变化的
  • bombardment [bɔmˈbɑ:dmənt] n. 撞击
  • asteroidal body [ˈæstərɔid - l - ˈbədi] n. 行星体
  • carbon dioxide [ˈkɑ:bən - daɪˈɔksaɪd] n.二氧化碳
  • greenhouse effect [ˈɡri:nhaus - iˈfekt] n.温室效应
  • Venusian [vi:nˈju:siən] adj.金星的