The random sample selection and different sample positions ensure the samples to be representative and fair.

计算机随机选择采样点，采样点车车不同，保证了样品的代表性、公正。

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The random sample selection and different sample positions ensure the samples to be representative and fair.

计算机随机选择采样点，采样点车车不同，保证了样品的代表性、公正。

youdao