将儒略日计数转为罗马儒略历。
The JDToJulian() function converts a Julian day count to a Julian calendar date.
根据罗马儒略历，春分、秋分以及四季每年提前11分钟出现，1500年后则提前至3月11日。
Using the Julian calendar, the spring and fall equinoxes and the seasons were arriving 11 minutes earlier each year. By 1500 the vernal equinox had fallen back to March 11.
公历最初是基于罗马的儒略历的。
The Christian calendar was originally based on the Julian calendar of the Romans.
儒略历在公元前45年开始被使用，它是被凯撒大帝改良的罗马历。
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar.
儒略历在公元前45年开始被使用，它是被凯撒大帝改良的罗马历。
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar.
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