Frost Descending is the 18th solar term among the 24 solar terms and the last solar term in autumn.
霜降，是二十四节气中的第十八个节气，秋季的最后一个节气。
After entering the Frost Descending Solar Term, the scene of late autumn is obvious, and cold air moves southward more and more frequently.
进入霜降节气后，深秋景象明显，冷空气南下越来越频繁。
Frost fall does not mean "frost fall", but a sudden drop in temperature and large temperature difference between day and night.
霜降不是表示“降霜”，而是表示气温骤降、昼夜温差大。
As far as the national average is concerned, "frost fall" is the season with the largest temperature difference between day and night in a year.
就全国平均而言，“霜降”是一年之中昼夜温差最大的时节。
Since "frost" is the expression of cold weather and large variation of temperature difference between day and night, it is named after "frost fall", which means "sudden drop of temperature and large temperature difference between day and night".
由于“霜”是天冷、昼夜温差变化大的表现，故以“霜降”命名这个表示“气温骤降、昼夜温差大”的节气。