柔和燃烧的火焰面分散，燃烧反应在空间较大范围内发生，火焰亮度低，OH信号强度和脉动都非常弱。

The flame of mild combustion is distributed in a large space, flame luminosity as well as OH intensity is very low.

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相反，根据量子力学的怪异说法，黑洞就像行将熄灭的火焰里那飘摇的灰烬，其光亮度应该是微乎其微的。

Instead, because of the quirks of quantum mechanics, they should glow ever so faintly, like smouldering embers in a dying fire. The implications were huge.

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深色可以给火焰增加亮度，而且要确保你的注意力在火焰本身上，保持背景的简单是很重要的。

A dark color adds intensity to the fire and keeping the background simple to begin with is important to ensure that you concentrate on the fire itself.

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