The material covered in this article has been (i) ___ in previous publications, and since currently neglected areas remained unexplored, the article contains no (ii) ___ .

　　Blank (i)

　　Blank (ii)

　　A. skirted

　　D. revelations

　　B. scrutinized

　　E. distortions

　　C. countered

　　F. conclusions

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