Using this model, track quality index (TQI) data were predicted and their accuracy was tested.

应用此模型对轨道质量指数TQI数据进行分析预测，并对其精度进行检验。

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There's something called the Air Quality Index, or the AQI, and it keeps track of how clean or populated the air is on a day to day basis.

空气质量指数，简称AQI，是对每天空气清洁或污染的情况进行追踪记录。

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