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短语
artificial satellite
天文学 künstlicher Satellit; Sputnik m
artificial satellite Any man-made object placed in a near-periodic orbit in which it moves mainly under the gravitational influence of one celestial body, such as the earth, sun, another planet, or a planet's moon
环境 Künstlicher Satellit
artificial satellite: 4 短语, 2 学科
天文学3
电子产品1