而地球的自转效应却能减小地幔运动的临界阻力，因此它们对地幔热力不稳定性都具激发作用，而对地幔粘滞性和热传导效应，关系式表明，它们对地幔热力不稳定性都具致稳作用。
Both effects therefore can excite the motion of the mantle. Moreover, the formula reveals that both the viscosity of the mantle and heat conduction may stabilize the motion of the mantle.
而地球的自转效应却能减小地幔运动的临界阻力，因此它们对地幔热力不稳定性都具激发作用，而对地幔粘滞性和热传导效应，关系式表明，它们对地幔热力不稳定性都具致稳作用。
Both effects therefore can excite the motion of the mantle. Moreover, the formula reveals that both the viscosity of the mantle and heat conduction may stabilize the motion of the mantle.
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