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词汇 surd
释义

surd

noun
/sɜːd/
/sɜːrd/
(also irrational number)
(mathematics数学)
  1. a number, for example π or the square root of 2, that cannot be expressed as the ratio of two whole numbers无理数
    词源mid 16th cent.: from Latin surdus ‘deaf, mute’; as a mathematical term, translating Greek (Euclid) alogos ‘irrational, speechless’, apparently via Arabic jid̲r aṣamm, literally ‘deaf root’.
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