system /'sistom/ n.系统, amazing /o'meizuy adj.令人大为, 惊奇的, planet /plennt/ n.行星, * /biljon/num.十亿, cover /'kavo(r)Vv.盖:覆盖, area /'eorio/n.地区:地域, freezing /'fri:zay adj.极冷的, north /no:0/ n.北:北方, pole /pool/ n.(行星的)极:地极, metre /mi:to(r)/n、米, reach /ri:t5/v.足够达到, wide /ward/ adj、宽的:宽阔的, provide /pro'vaid/v.提供:供应, explore /ik'splb:(r)y/v.探索,

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