threadbare

adj.

（衣服等）穿旧的；（衣料等）磨得很薄的；陈旧的；老一套的

1. The carpets had worn rather threadbare.
   地毯已磨得相当破旧了。
2. He had thrummed upon this topic till it is threadbare.
   他对这个问题一再发言已使它成为陈词滥调。

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