use it or lose it
US /juz ɪt ɔr luz ɪt/
UK /juːz ɪt ɔː luːz ɪt/
成語
不進則退, 不用則廢
used to say that if you do not practice or use a skill or ability, you will forget how to do it or lose the capacity to use it
範例:
•
I haven't played the piano in years, and it's definitely a case of use it or lose it.
我好幾年沒彈鋼琴了，這絕對是不進則退的情況。
•
Mental exercise is important for seniors; it's a matter of use it or lose it.
腦力鍛煉對老年人很重要；這就是不進則退的問題。