这种波动还能使球飞向不可预知的方向。
These fluctuations could cause the ball to bend in unpredictable ways.
另外，随着加铋后石墨球的细化，低温冲击韧度数值波动变小，性能变得更加稳定。
Additionally, the fluctuations in low-temperature toughness are reduced by adding Bi to refine graphite sphere, the performance becomes more stable.
利用线性变换的方法，将球坐标下矢量波动方程解的形式l、M和N变换为其他多种形式。
By the method of linear transformation, the solution forms of vector wave equation in spherical coordinates, l, m and n, are transformed to the many other kinds of forms.
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