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margin of error

noun
🔊/ˌmɑːdʒɪn əv ˈerə(r)/
🔊/ˌmɑːrdʒɪn əv ˈerər/
[usually singular]
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  1. an amount that you allow when you calculate something, for the possibility that a number is not completely accurate误差幅度
    • The survey has a margin of error of 2.5 per cent.该调查的误差幅度为2.5％。