Yahoo香港字典 搜尋

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1. Oxford American Dictionary

   be well up on

   • ph.
     be well informed about
2. • 相關詞

   be (well) up on (or in)

   • ph.
     well informed about

   Oxford American Dictionary

   be (well) up on (or in)

   • ph.
     be well informed about

   Oxford Dictionary

3. • 更多解釋

   be well up on

   • ph.
     be well informed about

   Oxford Dictionary