Its pathogenesis is not yet clear.
其发病机制尚不十分明确。
DR is the microvascular disease and its pathogenesis is still not very clear.
DR为微血管病变，其发生机理仍不十分清楚。
Its basic pathogenesis is the deficiency of kidney and the stagnation of blood.
本研究认为肾虚是骨转移癌的发病根本，基本病机是肾虚血瘀。
Its exact etiology and pathogenesis remain unknown.
目前其确切病因和发病机制不详。
Its exact etiology and pathogenesis remain unknown.
目前其确切病因和发病机制不详。
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