The police identified the murderer from a smudge of blood on the shirt.
警方





辨认出凶手。
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最终领域
活大爆炸 第10季 In 1925, when Edwin Hubble looked at the brightness of variable stars in a smudge called Andromeda, they appeared much dimmer than their pulsing rate predicted, and Hubble realized these stars were too far away to be in the MilkyWay.
1925 年当 Edwin Hubble 看着仙女座星体中各种变星
亮度,发
它们
亮度比预测
要暗
多,并且 Hubble 也认识到这些恒星
一个很远
地方,不可能是
银河系内。
These stains—or " ghosting" —can also appear if you smudge around fresh markings, which shifts around the layers of polymers and pigments, so that the polymers don't form that nice barrier between the pigment and the board.
这些污迹,或者说“鬼影”,
你擦除刚写下
笔迹时也会出
。它们会
聚合物层与色素层周围转移,导致聚合物无法
色素层与白板之间形成有效屏障。