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1. Oxford American Dictionary

   up and down

   • ph.
     moving upward and downward；to and fro
2. • 釋義

   ph.

   片語

   • 1. moving upward and downward
   • 2. to and fro
   • 3. to and fro along
   • 4. in various places throughout
   • 5. in varying states or moods; changeable