Abstract : The two factor random experiments were conducted to study the effects of nitrogen applied and planting density on ratoon rice yield of II youhang1 on culture of early rice.
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the two factor random
双因素随机
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Matthews used the fact that for any large collection of random numbers, the probability that any two have no common factor is 6/pi2.
马修斯的计算利用了这样一条定理：对于任意一群随机数的大集合，任意两个数没有公约数的概率为6/pi2。
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