falloff

noun

a noticeable deterioration in performance or quality
性能または品質の顕著な悪化
- the team went into a slump
  チームはスランプに陥った
- a gradual slack in output
  生産量のゆるやかな落ち込み
- a drop-off in attendance
  出席率の減少
- a falloff in quality
  品質の低下

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