他喜欢重击，由于硬球，他可以。
硬球是本书独创的一个寓意深刻的概念。
Hard ball is the original book, the concept of a profound meaning.
今年夏天，爸爸经不住我的软磨硬泡，终于带我去打乒乓球了；
This summer, father giving my impending nuptials, finally took me to play table tennis;
这说明随着球磨时间的增加，材料由软磁性向硬磁性转化。
Material was transformed soft magnetic property into hard magnetic property.
这说明随着球磨时间的增加，材料由软磁性向硬磁性转化。
Material was transformed soft magnetic property into hard magnetic property.
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