1. Persist in progress and oppose retrogression !
    坚持进步，反对倒退！

1. 衰退：retrograde ejaculation 倒行射精 | retrogression 衰退 | retrogressive evolution 后退演化

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2. 后退：retrograde wave 後退波 | retrogression 後退 | retroreflection 回反射

1. 倒退;衰退;退化
    Retrogression means moving back to an earlier and less efficient stage of development.

    e.g. There has been a retrogression in the field of human rights since 1975.
           自1975年来，人权状况出现了倒退。

1. returning to a former state

    Synonym: regressionregressreversionretroversion

2. passing from a more complex to a simpler biological form

    Synonym: degeneration