立秋
Autumn Begins is the 13th in the 24 solar terms. It's on August 7 or 8 every year, meaning the beginning of the fall.
立秋是二十四节气中的第13个节气.每年的8月7日或8月8日是立秋,意味着秋天的开始.
When it comes to this season, the leaves of the firmiana tree start to fall, thus there is a saying of "One leave falls, autumn arrives." When the sun reaches the celestial longitude of 135 degrees, the summer is passing away and the weather turns cold gradually. People can feel the wind is getting cool and see fogs in the morning sometimes.
每到这个季节,梧桐树开始落叶,由此得来成语"一叶知秋".当太阳直射点到达天文经度135°时,夏天过去,天气逐渐转冷.人们可以感觉到风渐渐变冷,时而早上会见到雾.
2021-10-22（万方平台首次上网日期，不代表论文的发表时间）
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