The total concentrations of terephthalic acid and phthalic acid were higher in summer and winter, but lower in spring and autumn.
对苯二甲酸和邻苯二甲酸的质量浓度之和在夏、冬季较高，春、秋季较低。
The total concentrations of terephthalic acid and phthalic acid were higher in summer and winter, but lower in spring and autumn.
对苯二甲酸和邻苯二甲酸的质量浓度之和在夏、冬季较高，春、秋季较低。
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