结果表明， 填料的加入可以缩短磨合期，延长稳定磨损期。
The results show that bringing fillers in UH- MWPE can shorten breaking-in period, prolong the steady wear period.
HIV病毒会逐渐磨损人体免疫系统，潜伏期可达数年之久。
It gradually wears down the immune system (3) and can take years to cause symptoms.
他说有些发动机厂商不十分了解生物柴油对发动机磨损的影响程度，因此在针对生物柴油用户延长质量保证期时非常谨慎。
He said some engine manufacturers are wary about extending warranties to those who use biodiesel because not enough has been known about how the biodiesel affects engine wear.
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