retrogression [ˌretrəʊ'greʃən]

以下由轻松背单词网站提供

附加级

n. 倒退, 后退, 退步

Persist in progress and oppose retrogression! 坚持进步，反对倒退！
A cusp is also called a stationary point or point of retrogression gression. 尖点也叫做平稳点或逆行点。