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.
这次撞击将能够告诉我们答案的痕迹留在了岩石里——包括岩石中一个1英寸（约2.54厘米）厚的黑色煤灰层，之前这个煤灰层一直被认为是由地球大陆上广泛扩散的野火造成的。
The collision left behind tell tale traces in the rocks - including a black 'mat' of soot an inch thick thought to have been created by continental wide wildfires.
显然，其他野营的人也曾使用过这个地方，墙壁上还留有黑色的痕迹。
Other campers had obviously used the space and there were black marks on the walls.
他狩猎过的痕迹散布在这片绿海中，就像一连串黑色的岛屿。
Like a chain of grey islands, the marks of his hunting dotted the green grass sea.
夏季气候高温多湿，人们到了热天时每每大汗淋漓，手表一遇到汗水可能会在手腕上留下绿色或黑色的痕迹。
Hot and humid summer climate, people go to the hot days when each sweating, watch a sweat encounter may leave green or black marks on the wrist.
这场悲剧留下的唯一痕迹，是缠在她那的伤的手上的黑色绷带，她至死都是把它缠在手上的。
The only external trace that the tragedy left was the bandage of black gauze that she put on her burned hand and that she wore until her death.
原本光洁的黑色墙壁也经过了雨水的洗刷，显示出了一道道铁锈般的痕迹。
Original glossy black walls after rain washed, showed a Road rust-like marks.
原本光洁的黑色墙壁也经过了雨水的洗刷，显示出了一道道铁锈般的痕迹。
Original glossy black walls after rain washed, showed a Road rust-like marks.
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