lesson 43lesson 43over the south Poleover the south PoleFFour oceans in the world the Pacific Oceanthe Indian OceantheArcticOceanAthe AtlanticOceanNew words and expressionsNew words and expressionspole n.pole n.（地球的）极（地球的）极flight n.flight n.飞行飞行explorer n.explorer n.探险家探险家lie v.lie v.处于处于serious adj.serious adj.严重的严重的point n.point n.地点地点seem v.seem v.似乎似乎crash v.crash v.坠毁坠毁sack n.sack n.袋子袋子clear v.clear v.越过越过aircraft n.aircraft n.飞机飞机endless adj.endless adj.无尽的无尽的plain n.plain n.平原平原First lis
