needle fall 中文意思是什麼

needle fall 解釋
針葉脫落
  • needle : n 1 針 縫針；編織針。2 （注射、唱片等的）針；磁針 羅盤針 指針。3 尖巖 尖峰；方尖碑；【化、礦】針...
  • fall : vi （fell; fallen ）1 落下；散落，（毛發等）脫落；降落；（水銀柱等）下降；（物價）下落，跌落；（...
  1. If a needle is thrown at random on a sheet of paper ruled with lines whose distance apart is exactly equal to the length of the needle, how often can it be expected to fall on a line and how often into a blank space

    如果一根針隨機的扔到一張橫格紙上，橫格之間的距離等於針的長度，那麼針落於一條線或落到空白處的概率是多少？
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