re·gres·sion
noun/rɪˈɡreʃn/
/rɪˈɡreʃn/
[uncountable, countable] (formal, usually disapproving)- regression (to something) the process of going back to an earlier or less advanced form or state
倒退；回归；退化 - He began to show signs of regression to his childhood.
他开始表现出回归童年的迹象。
Word Originlate Middle English: from Latin regressio(n-), from regredi ‘go back, return’, from re- ‘back’ + gradi ‘walk’. - He began to show signs of regression to his childhood.