日期:
来源:雅诚德英语网
Since the eccentricities are small, we can assume that the orbits of the Earth around the Sun and the Moon around the Earth are both circles.
由于偏心率小,我们假定地球绕太阳的轨道和月球绕地球的轨道都是圆形。
Since the eccentricities are small, we can assume that the orbits of the Earth around the Sun and the Moon around the Earth are both circles.
由于偏心率小,我们假定地球绕太阳的轨道和月球绕地球的轨道都是圆形。