To grasp the following useful important words and phrases of this unit:

minister, rather than, continent, eastward, surround, measure, extremely, settle, settle down£¬catch sight of, eagle, have a gift for, within, border, slightly, port, figure, figure out, official, maple, frost, wealthy, tour, distance, flow, downtown, approximately, as far as, dawn, near-by, tradition, terrify£¬pleased, impress, impressive