The dates of the carnival vary year depending on the date of Ash Wednesday, the first day of Lent.
每年狂欢节的时间都根据圣灰星期三来定,即四旬斋的第一天。
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But it's not that simple either, because the dates of the perihelion and aphelion are also shifting.
但这并不是简单的一件事情,因为近日点和远日点的日期都会变换。
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