以下为句子列表：
英文: This can be a useful technique for seeing faint nebulosity- it's often a lot easier to see such nebulosity as faint shading against a white background rather than as not quite blackagainst a black background.
中文: 这个选项对于看暗星云是十分有用的-暗星体显示在亮背景上比“不是非常黑”的暗星体显示在黑背景上要容易观察的多。
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