on a voluntary basis - Spanish English Dictionary

Maybe the correct one is...

  1. on a country basis
  2. on a monthly basis
  3. on a complimentary basis
  4. on a secondary basis
  5. in a voluntary way
  6. on a regular basis
  7. on a sound basis
  8. on a long-term basis
  9. on a short term basis
  10. on a short-term basis

Or try these...

Found in Turkish English Dictionary
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