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【词汇解释】
1.planetary adj. 行星的，有轨道的
如：Just as the planets revolve about the sun, planetary electrons are thought of as revolving about the nucleus.
正像行星围绕太阳转一样，行星般的电子被认为是围着原子核转的。
One of the four brightest satellites of Jupiter and the sixth in distance from the planet. Originally sighted by Galileo, it is the largest planetary satellite.
卡利斯托卫星木星最亮的四颗卫星之一，是距木星第六远的卫星。最初为伽利略所发现，它是最大的行星卫星
2.enlist v. 徵募，参与，支持
如：Sarah has been enlisted to organize the party.
萨拉已应邀组织这一聚会。
He enlisted when he was 18.
他18岁时入伍。
3.high-resolution adj. 高清晰度的，高分辨率的
4.spin-off n. 1.副产品 2.让产易股，抽资脱离
如：This new material is a spin-off from the space industry.
这种新材料是航天工业的副产品。