Question

a drop in the bucket
 a drop in the bucket — see drop, 1
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 Main Entry: bucket
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 a drop in the bucket  (US)   ( or Brit   a drop in the ocean)
   informal   : an amount that is so small that it does not make an important difference or have much effect
   They need to raise thousands of dollars for this project, so our 20-dollar donation is just a drop in the bucket.
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 Main Entry: drop