n. 退回, 复归权, 回归, 倒退, 退步, 退化, 退行
vi. 退回, 复归, 回归, 倒退, 退步, 退化, 退行
英文释义
n. the reasoning involved when you assume the conclusion is true and reason backward to the evidence
v. go back to a statistical means
v. get worse or fall back to a previous condition