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。
But the time extending enough, the density of sheet has small changes.
但时间延长到一定程度，发泡塑料密度变化不大。
Hair shaft abnormalities present as changes of hair color, density, structure and the length.
毛干的异常表现为毛发颜色、密度、结构和长度的改变。
Hair shaft abnormalities present as changes of hair color, density, structure and the length.
毛干的异常表现为毛发颜色、密度、结构和长度的改变。
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