Black can also be seen negatively because the color is associated with death, mystery and the unknown.

黑色也可以被看作是消极的，因为这种颜色与死亡，神秘和未知相联系。

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Black is associated with power, elegance, formality, death, evil, and mystery.

黑色与权力、优雅、拘谨、死亡、魔鬼和神秘相关联。

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Their exact nature has remained a mystery, but one suggestion is that some ULXs are black holes with masses between about a hundred and a thousands times that of the Sun.

其确切性质仍然是个谜，但有一个建议是，一些超亮度X射线源之间有大约质量是太阳100和1万倍的黑洞。

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Admittedly, these graphic displays of anatomy and procedures may not be for everyone-however, when the mystery is removed, and the black box is opened, some patients may feel more informed and be able to relax before the start of their procedures.

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