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1.The Alfven number is a measure of the strength of the magnetic field around a planet.
阿尔夫文数是衡量行星周围磁场强度的一种度量。
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2. This research has led to the discovery of the Alfven number, which is essential for understanding the behavior of plasmas.
这项研究导致了阿尔夫文数的发现，这对于理解等离子体的行为至关重要。
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3. The Alfven number can be used to predict the flow of plasma in space, which is importantfor space exploration and satellite communication.
阿尔夫文数可以用来预测空间中等离子体的流动，这对于太空探索和卫星通信非常重要。