The strong 3 gravitational pull of our moon ACTS as a global 4 gyroscope stabilizing the Earth's axis.
月亮强大的引力就像是地球的一个陀螺仪，保证了地球轴心的稳定性。
2
This paper gives the dynamic equations of vibratory wheel silicon micromechanical gyroscope and their motion law, analyses drifts of the gyroscope, when vehicle rotates around any axis uniformly.