backslide
vi. 滑坡; 倒退; 退步; 故态复萌
1. drop to a lower level, as in one's morals or standards
Many Christians backslide because this truth is not clearly taught.
许多基督徒所以冷淡退后,就是因为不认识这个真理.
He's a reformed criminal who may yet backslide.
他是个经过改造的罪犯,然而仍有可能故态复萌.
I managed to keep of cigarettes for three months, but recently Iafraid I've begun to backslide.
我设法戒了三个月的烟, 但是最近我恐怕又开始故态复萌了.