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首先,我们知道所有行星的轨道都很靠近地球的轨道平面——黄道面。
First, we know that the planets all orbit close to the earth's orbital plane, the ecliptic.
youdao
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首先,我们知道所有行星的轨道都很靠近地球的轨道平面——黄道面。
First, we know that the planets all orbit close to the earth's orbital plane, the ecliptic.
youdao