1. 二志是什么意思
1. 本文主要从四个方面来探讨此二志之间的关系，以期较全面地阐述二志的异同，较详细地考察唐以前的目录学流变与学术流变。
This text probes into the relation between the two from four respects mainly, expect to explain the similarities and differences of the two in an all-round way, investigate Tang's prevenient bibliography rheology and academic rheology in detail.