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1. Oxford Dictionary

   knock something out

   • ph.
     destroy, damage, or disable a machine or piece of equipment；produce work at a steady fast rate
2. • 釋義

   ph.

   片語

   • 1. destroy, damage, or disable a machine or piece of equipment
   • 2. produce work at a steady fast rate
   • 3. empty a tobacco pipe by tapping it against a surface
   • 4. earn a specified sum of money