The Ptolemaic system enabled astronomers to make accurate predictions of the motions of the planet, in fact more accurate predictions at first than the Copernican theory which we now would say is true.
托勒密系统使得天文学家 对行星运行做出准确的预测， 事实上甚至比哥白尼理论 在最初时更准确， 虽然后者现在被公认是正确的。