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1·The Christian calendar was originally based on the Julian calendar of the Romans.

公历最初是基于罗马的儒略历的。《柯林斯英汉双解大词典》

2·It is based on 46 years BC, the Julian calendar as the basis.

它是以公元前46年的《儒略历法》为依据的。

3·By then the Julian calendar was out of sync with the seasons by 11 days.

那时儒略历对季节的偏差已到了11天。

4·By 1582 the Julian calendar was out of sync with the seasons by several days.

到1582年，儒略历日期对季节出现了数天的不同步。

5·Most European countries used the Julian calendar prior to the Gregorian.

大多数欧洲国家在格里高里历之前使用儒略历。

6·The JDToJulian() function converts a Julian day count to a Julian calendar date.

将儒略日计数转为罗马儒略历。

7·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。

8·Our modern calendar system of 12 months started with the Julian calendar circa 45 B.C..

我们现在一年分12月的做法始于约公元前45年的儒略历。

9·Using the Julian calendar, the autumnal equinox, vernal equinox, and seasons were arriving 11 minutes earlier each year.

利用凯撒制定的历法，每年的春秋分日和四季都会提前11分钟。

10·The Julian calendar approximated the mean tropical year as 365.25 days and proposed 366-day leap years for every one divisible by four.

儒略历将太阳年划为365.25天，闰年366天，每四年一次。