在中国农历中，立秋(Start of Autumn)意味着夏天的结束和秋天的开始。立秋带来的首先是天气的变化，气温逐渐下降。人们看到树叶开始变黄飘落时，知道秋天已经来临，这就是所谓的“一叶知秋”。但此时酷热的天气并未完全结束，高温通常还会持续一段时间，被称为“秋老虎”。立秋对农民意义重大，这时各种秋季作物迅速生长、开始成熟，收获的季节即将到来。
参考译文：
In the Chinese lunar calendar, the Start of Autumn signifies the end of summer and the beginning of autumn. The first change brought about by the Start of Autumn is in the weather, with temperatures gradually dropping. When people see the leaves starting to turn yellow and fall, they know that autumn has arrived. This is what is known as "one leaf heralds the coming of autumn." However, the scorching hot weather has not completely ended at this time, and high temperatures usually persist for a while, which is referred to as the "autumn tiger." The Start of Autumn holds great significance for farmers. At this time, various autumn crops grow rapidly and begin to mature, and the harvest season is approaching.
