fall into disuse

• vi. 废而不用

fall into disuse的用法和样例：

例句

用作不及物动词 (vi.)

1. These methods have fallen into disuse.
   这些方法已废而不用了。
2. Words which fall into disuse may sometimes be revived with a new meaning.
   废而不用的词有时会有新意而再用起来。