《Tetrabiblos》The Quality And Nature Of The EffectClaudius Ptolemy（Ashmand 英譯 1822）
It is also requisite to notice, with respect to general events, the risings or first appearances of those celestial phenomena called comets, whether presenting themselves at ecliptical times or at any other periods.
段落 tetra-2-thequality-51public-domain (Ashmand 1822)
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