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岁差，基本上是地球自转轴方向的改变。 Precession, basically is the change in the direction of earth's axis of rotation. | ||
北极是地球表面与假想的自转轴相交的北交点。 The North Pole is the spot on Earth’s globe that marks the northern end of an imaginary stick Earth spins around. | ||
形成季节的主要因素不是地球公转轨道的形状，而是地球自转轴的倾斜。 The tilt of the earth's axis, not the shape of its orbit, is what is responsible for the seasons. | ||
结果表明，在正交标架中，当陀螺沿径向自由下落时，其自转轴朝径向偏转。 It is shown that, the axis rotates to the radial direction in the orthonormal frame if the gyroscope freely falling along the radial direction. | ||
地球的自转轴与黄道面呈一定角度。黄道面是地球公转轨道所在的一个假想平面。 The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun. | ||
每年的二至点和二分点总会发生一些变化因为地球正改变着相对于绕日轨道面的自转轴角度。 From year to year, there is always some variability in the equinoxes and solstices because of the way Earth's changing tilt matches up with its orbit around the sun. | ||
