The method belongs to the dynamic classification ones which has solved the problem of rigid classification boundry, in the conventional methods.
该法属于动态分级法，解决了传统方法中分级界线僵硬的问题。
The method belongs to the dynamic classification ones which has solved the problem of rigid classification boundry, in the conventional methods.
该法属于动态分级法，解决了传统方法中分级界线僵硬的问题。
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