红色变(red degeneration): 多见与妊娠期和产褥期，为一种特殊类型坏死．肌瘤体积迅速改变，发生血管破裂，出血弥散于组织内．肌瘤剖面呈暗红色，如半熟的...
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而假如变紫红色：无磁性的为高锰钢，有磁性的通常为通常钢或低合金钢。
And if the purple red: nonmagnetic as high manganese steel, magnetic usually usually steel or low-alloy steel.
把管内的氢氧化钠残液倒入水中，你就会发现：溶液会使红色石蕊试纸变蓝。
Turn the remnant of sodium hydroxide in the tube into water, and you'll find the solution turns red litmus blue.
黄昏或黎明前天空变微红色是由于地球的大气原因，而黄道光则发生在远离我们星球的外太空。
The reddish skies at dawn and dusk are caused by Earth's atmosphere, and the zodiacal light originates far outside our atmosphere.
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