The free radicals can reduce spontaneous combustion temperature of diesel fuel greatly and shorten the ignition delay period, and thus improve the combustion performance of diesel engine.

十六烷值改进剂受热容易分解产生活性自由基、降低了柴油的自燃点，从而缩短了滞燃期，改善了发动机的燃烧性能。

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The results show that the start timing of combustion is advanced and the ignition delay period is shortened.

通过对燃烧特征参数的计算分析，发现生物柴油的燃烧始点有所提前，滞燃期缩短；

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The free radicals can make spontaneous combustion activation energy of diesel fuel reduced greatly and shorten the ignition delay period, and thus improve the combustion performance of diesel engine.

十六烷值改进剂受热分解产生活性自由基，使得柴油的自燃活化能大大降低，从而缩短发动机燃烧的滞燃期，改善发动机的燃烧性能。

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But it balked at paying additional interest to cover the period of delay.

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Under federal rules, individuals are required to enroll in Medicare when they turn 65, or pay a premium penalty of 10% for each 12-month period they delay.

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According the Board, almost two-thirds of Americans between the ages of 45 and 60 are planning to delay their retirements past the traditional period of exiting the workforce in their early to mid sixties, likely as a result of the continuing impact of the weak economic environment on their finances.

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