Since the oil analysis data were non-stationary and non-equal time-interval time se - ries in general, which were difficult to analyze.
由于油液分析数据通常是非平稳且非等时间间隔时序，给分析工作带来困难。
Since the oil analysis data were non-stationary and non-equal time-interval time se - ries in general, which were difficult to analyze.
由于油液分析数据通常是非平稳且非等时间间隔时序，给分析工作带来困难。
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