求翻译：由于题目收集所得的数据只代表部分的情况并且存在偏差。在具体建模时，虽然模型具有广泛的适用性，但是模型只考虑了污染物有工厂排除，没有考量其他来源，导致污染量偏小。是什么意思？

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The topics the data collected represents only part of the situation and there is a discrepancy. The specific modeling, though a model with a wide range of applicability, but the model only takes into account the pollutants from factory, there are no considerations other sources, the amount of pollut

And because the topic collection obtained data only has the deviation on behalf of the part situation.When concrete modelling, although the model has the widespread serviceability, but the model had only considered the pollutant has the factory to remove, has not considered other origins, causes the

Because the topic represents only part of the data collected and there is a deviation. In modeling, although models with a wide range of applicability, but models take into account only the pollutants factories excluded, did not consider other sources of lead pollution load is small.

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