The "Reverse colours" check box allows you to display the entire image as a "negative" image - ie dark stars on a light background, rather than the normal bright stars on a dark background. 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 black" against a black background.
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Unfortunately, this is not quite true — or at least not as black and white as it may seem.
遗憾的是,这种观点并不完全正确,或者至少不像白与黑那样分的清楚。
"Many materials can absorb light quite well but not generate electricity-like, for instance, black paint," he explains.
“许多材料能够很好地吸收阳光,但是无法转化成电能,比如黑色涂料,”他解释说。
But black Americans are still pinching themselves, still not quite able to believe what has been achieved.
但美国黑人仍在折磨自己,仍不肯完全相信他们已经达到的成就。
And here in the middle of the page a little ways down: My love's striped black-and-white cotton frock, jaunty blue cap, white socks and brown moccasins were not quite in keeping with the large, beautifully cut aquamarine on a silver chainlet which gemmed her throat, a spring rain gift from me.
在这一页中间偏下的地方:,我的小情人穿着黑白条子的棉布裙,带着鲜艳的蓝色帽子,白袜子和亮皮鞋与她脖子上那条优美的,蓝宝石项链有些不协调,这是由于那场春雨我送给她的礼物。
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