《黄帝内经·素问·金匮真言论》
一年的四个季节，有相克的关系，比如春胜夏，夏胜冬，冬胜夏，夏胜秋，秋胜春，某个季节出现了克制它的季节气候，这就是所谓四时相胜。
所谓得四时之胜者，春胜长夏，长夏胜冬，冬胜夏，夏胜秋，秋胜春，所谓四时之胜也。
The four seasons of the year are in a relationship of mutual restraint, such as spring overcoming summer, summer overcoming winter, winter overcoming summer, summer overcoming autumn, and autumn overcoming spring. When a season is overcome by the climate of its restraining season, this is what is called the mutual overcoming of the four seasons.