《Tetrabiblos》Knowledge May Be Acquired By Astronomy To A Certain ExtentClaudius Ptolemy（Ashmand 英譯 1822）
Secondly, it is not attempted to be denied that any individual, although he may have attained to the greatest possible accuracy in the science, must still be liable to frequent error, arising out of the very nature of his undertaking, and from the weakness of his limited capacity in comparison with the magnitude of his object.
段落 tetra-1-knowledgem-35public-domain (Ashmand 1822)
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