这有点像在无重力状态下。
为简单起见，本文主要考虑的是一个二维无重力模型。
And for the sake of simple, we considered a 2d model without gravity.
他们使用一种机械式的无重力装置，用大约80,000马力的引擎来驱动。
They use a mechanical antigravity device driven by engines developing approximately 80,000 horse power.
超重力是制备无偏析晶体材料的有效手段之一。
Extra gravity is an effective method of producing homogeneous crystal material.
若使合力总是指向重力的反方向，则这个合力是一种无支撑的悬浮力。
If the direction is opposite with gravity, the resultant force is a levitation force.
若使合力总是指向重力的反方向，则这个合力是一种无支撑的悬浮力。
If the direction is opposite with gravity, the resultant force is a levitation force.
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