For example, Figure 11 illustrates that the built-in OCR in Robot is not able to detect the text with the original Reflection for IBM internal sample, which has a dark background and blue text.

例如，图11说明了Robot内嵌的OCR不能检测到Reflection for IBM internal实例的原有文本，只显示出黑屏和蓝色文本。

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As clear water gives almost no reflection in the near infrared spectrum, it often appears to be dark in colour.

清澈的水体在红外线下基本上是不会反射任何光线，故它们通常呈现深蓝色或黑色。

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Other reflection nebulae are scattered around, along with remarkable dark dust nebulae and the faint reddish glow of hydrogen gas.

影像也呈现了散布在各处的反射星云、幽暗的尘埃星云及发出暗淡红光的氢气云。

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The train window was so dank with mist anyway that it was hard to see anything at all except the reflection of my own dark figure hunched down under the baggage rack in my black tweed coat and hat.

NPR: Excerpt: The Sherwood Ring

The only time I really experience any self-reflection these days is when my computer sleeps and my screen goes dark.

FORBES: Does the Internet Make You More or Less Connected?