The method based on statistical technique can only ensure the recall to some degree, but the precision is relatively low.

完全依靠统计方法只能保证一定的召回率，而准确率偏低。

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Because of the inherent bias in the traditional grey-forecasting model and the fixed choice of its parameter, the forecast precision is relatively low and unsuitable to the long-term forecasting.

由于传统灰色预测模型固有的偏差和模型参数的固定选择，导致预测精度较低，不适应中长期负荷预测。

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The balance wheel is the main part of a wrist watch. However, now its percent of pass is relatively low in our watch industry because of its small size and high precision.

摆轮是手表的主要零件，由于它尺寸小，精度要求高，一般说来，它的产品合格率较低。

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