1. The costume served as a stand-in for herself. a second skin never totally assimilated to the person hidden under it but so integral to her that even when it was taken off, it retained something of the wearer's being.
难词注解：stand-in n.替身，代表，作替身assimilate vt.吸收，消化，使同化
2. Toward the end of the afternoon, we followed what seemed to be a large movement of chimpanzees into one great open room in the forest, relatively clear except for columns of nut trees.
难词注解：column n. 列,专栏