Yahoo香港字典 搜尋

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1. Oxford American Dictionary

   nail down

   • ph.
     fasten something securely with nails；identify something precisely
2. • 釋義

   ph.

   片語

   • 1. fasten something securely with nails
   • 2. identify something precisely
   • 3. secure an agreement
   • 4. succeed in causing someone to make a firm commitment