old hat
noun /ˌəʊld ˈhæt/
  /ˌəʊld ˈhæt/
[uncountable]- something that is old-fashioned and no longer interesting
- Today's hits rapidly become old hat.
 
 
| 单词 | old hat | 
| 释义 | old hatnoun /ˌəʊld ˈhæt/   /ˌəʊld ˈhæt/ [uncountable]
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