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慢速英语:Was The Planet Mars Less Red Long Ago?

Source: VOA    2016-06-17   English BBS   Favorite  


Words in This Story
ice age – n. a time in the distant past when a large part of the world or a planet was covered with ice

pole – n. either end of the imaginary line around which something such as the earth turns

ice cap – n. a very large and thick sheet of ice that covers the North Pole, the South Pole or another region

tilt – n. the state of having one side higher than the other


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