Under the Gregorian calendar, the year is 365.2425 days long, "close enough to the true fraction that the seasons don't drift," MacRobert said.

在格里历中，一年的长度为365.2425天，“这个数值足够接近正确值，这样四季的时间就不会变动不定了，”麦克罗伯特说。

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MacRobert said the full moon falling on the autumnal equinox is simply one of many astronomical coincidences that happen to be occurring this month.

麦克罗伯特说满月于秋分日落下不过是众多天文巧合事件中的一例，碰巧发生在了本月。

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The spring and autumnal equinoxes, for starters, are the only two times during the year when the sun rises due east and sets due west, according to MacRobert.

春秋分日，首先是一年中太阳正东方升起正西方落下的唯一两天。麦克罗伯特说。

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