A: a reversal in the rotation of Earth is impossible.
答：地球发生相反方向的旋转是不可能的。
By the principle of reversal process, the formula of material removal rate (MRR) in wafer rotation grinding process is deduced. The relationship between MRR and the grinding parameters is given.
在反转法的原理上，建立了硅片自旋转磨削材料去除率的理论模型，推导了材料去除率公式，分析了磨削工艺参数与材料去除率的关系。
They clfunction a relationship within the rotation and the magnetic polarity of Earth, which does change irregularly, with a magnetic reversal taking place every 400,000 years on audio-videoerage.
他们声称地球磁极和自转有相关。地球的磁极的确会不规律的改变， 大约均匀400，000年发生一次磁极转换。
Based on this model, the expressions of critical field for the irreversible reversal magnetization and the coercive force are derived for both the parallel rotation and symmetric fanning mechanisms.
基于此模型，推导了纳米线反磁化过程中不可逆磁化的临界场和矫顽力在一致转动和对称扇形模式下的表达式。
A reversal in the rotation of Earth is impossible.
地球旋转逆向是不可能的。
They claim a relationship between the rotation and the magnetic polarity of Earth, which does change irregularly, with a magnetic reversal taking place every 400,000 years on average.
他们声称地球的自转和地球的磁极的关系不稳定，预示着平均每40万年就有一次的磁极颠倒。
For the smallest wire, the reversal model is coherent rotation .
直径很小时，反转模式为一致反转；
For these two series of samples, the magnetization reversal process is accompanied by the combination of the pinned domain wall motion and domain rotation.
对于这一系列的样品，磁化翻转方式包含了畴壁运动和一致翻转。
For these two series of samples, the magnetization reversal process is accompanied by the combination of the pinned domain wall motion and domain rotation.
对于这一系列的样品，磁化翻转方式包含了畴壁运动和一致翻转。
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