Asphaltene content increased, the deterioration of oil quality.
沥青质含量增高时，原油质量变坏。
The relationship between total polar component in oil and its dielectric constant was analyzed. the deterioration of oil with heated time and heated temperature was studied.
分析了油中的极化成分总含量与油的介电常数的关系，结果表明：提高油温、延长加热时间或长期存放都会使油的介电常数增加，从而导致油质量的恶化。
Museums that house Renaissance oil paintings typically store them in environments that are carefully kept within narrow margins of temperature and humidity to inhibit any deterioration.
收藏文艺复兴时期油画的博物馆通常将它们保存在严格控制温度和湿度的环境中，以防止老化。
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