求翻译：汽油的抗爆性能决定于汽油辛烷值的高低。汽车长期停驶，汽油的辛烷值会随着轻质成分的损失和胶质含量的增加而下降，从而使其抗爆性随之降低。因此，汽油油箱要严密封闭，并且避免温度过高。汽油储存的时间最好不要太长。是什么意思？

Antiknock properties of gasoline is determined by the level of octane number of gasoline. Car long-term suspended, the octane number of petrol will decline with the loss of light composition and colloid content increase, which decreases its antiknock. Therefore, the gasoline tank tightly closed, and

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Decided to gasoline octane number of gasoline antiknock performance level. Auto long-term suspension of gasoline octane number as the light component losses and gum content increases decreases, thus anti-knock quality also reduced. Therefore, gasoline tank to be tightly%2