最近发现了一个据估计有近500,000年历史的沉积物，该沉积物由木炭、燃烧的动物骨头和烧焦的岩石组成。
A site containing a deposit, estimated to be nearly 500,000 years old, consisting of charcoal, burned animal bones, and charred rocks, has recently been found.
在比较高的温度下，自动变速器油燃烧，导致它失去润滑性能并氧化，致使在整个变速器里留下沉积物。
At higher temperature the transmission fluid burns loosing its lubricating qualities and becomes oxidized leaving deposits all over inside the transmission.
燃烧室积碳提高了排气污染。机油必须被注入以减少这类沉积。
Combustion chamber deposits increase exhaust emissions. Oils must be formulated to reduce such deposits.
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