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The third option in addition to density level with color changes to pass more information.
第不一栽办法除了密度等第边，还诳骗色彩改变来传达更多的新闻。
youdao
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Material is the key point of the super-density information technology.
材料是超高密度信息存储的关键。
youdao
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Material is the key point of the super-density information technology.
材料是超高密度信息存储的关键。
youdao