The so-called "blood-fraction" laws of 1705 ruled that anyone who was at least 1/8 black — which meant one black great grandparent — could not be labeled white.

1705年所谓的“血统分数”法律规定，任何人只要有1/8的黑人血统——即有一位黑人曾祖辈——就不能认作白人。

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The oil major currently trades at a fraction of its net asset value, thanks mostly to the black eye it took from the massive oil spill in the Gulf of Mexico last year.

去年墨西哥湾所发生的大面积漏油事故使英国石油元气大伤，这位原油巨头目前的股价仅为其净资产值的零头。

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Because only a small fraction of light reflects off the coating, the human eye and sensitive detectors see the material as black.

因为只有极小部分的光线能够反射出涂层，因此肉眼和灵敏的探测仪所观察到的这种材料依旧是黑色的。

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