Explain the meaning of ups and downs with informal nouns

1, ups and downs, Chinese idiom, pinyin is diē dàng bù jū, which means free and unrestrained thinking, the same as "ups and downs".

2. From Ming Huangyuan and Wang Shizhen's Compendium of Song Di: "In August, Song killed Wang Sengda, secretary of the Chinese Academy of Sciences, who was able to warn young people without embarrassment."

3, as a predicate and attribute; Metaphor is unconstrained.