《Tetrabiblos》Tropical, Equinoctial, Fixed, And Bicorporeal SignsClaudius Ptolemy（Ashmand 英譯 1822）
The bicorporeal signs severally follow the fixed signs; and, being thus intermediately placed between the fixed and the tropical signs, they participate in the constitutional properties of both, from their first to their last degrees.
段落 tetra-1-tropicaleq-6public-domain (Ashmand 1822)
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