This approximation made the Julian calendar fairly accurate in tracking the annual seasons for several centuries. But eventually the approximation errors accumulated.
这种近似使儒略历准确工作了几百年,但是累计的误差也越来越大。
The tilt of Earth's axis, toward the Sun at some times of the year and away from the Sun at other times, is responsible for the annual cycle of seasons.
地轴的倾斜在一年中的某些时候朝向太阳,而在其它时间远离太阳,造成了每年的季节循环。
Later, they learned to work with the seasons, planting at the right time and, in dry areas, making use of annual floods to irrigate their fields.
后来,他们学会了按季节耕作,适时播种,以及在干旱地区利用每年的洪水来灌溉他们的农田。
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