- words that have fallen into disuse
- 废弃不用: pass into disuse; be discard ...
- 的: 4次方是 The fourth power of 2 i ...
- 词语: words and expressions; terms
- 废弃不用: pass into disuse; be discarded; be thrown out of use; stop using -- to be cast aside
- 不用的,废弃的: disused a. no longer used
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