fall-off

noun
🔊/ˈfɔːl ɒf/
🔊/ˈfɔːl ɔːf/
(also British English, less frequent falling-off)
[singular]
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  1. fall-off (in something) a reduction in the number, amount or quality of something(数量的)减少;(质量的)降低
    • a recent fall-off in sales近来销售量的减少
    Topics Change, cause and effectc2