其中一种说法是感恩节之后这一天拥挤的交通会使车轮在路面留下很多黑色痕迹，就有了“黑色星期五”这个说法。
One theory is that the wheels of vehicles in heavy traffic on the day after Thanksgiving day left many black markings on the road surface, leading to the term black Friday.
她女儿的腿上仍有一些痕迹，就像黑色的伤疤一样。
There are still some marks on her daughter's legs, like dark bruises.
而其他羽毛化石(尽管缺乏碳元素)中找到的痕迹，也许能显示已经因氧化而消失的黑色素体的原始存在。
But trace imprints found in other fossilised feathers (despite an absence of carbon) may indicate the original presence of melanosomes that have since been lost to oxidation.
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