在教学中，老师用生动的实验让学生了解了色彩的三大属性：色相，明度和饱和度。
In process of teaching, the experiment the teacher conducted made the students understand the properties of the color: hue, value and saturation.
天然牙的视觉外观除了颜色的三要素色相、明度、饱和度以外，还有许多第二光学特征：半透性、浑浊度、晕色、表面光泽度、荧光性，其中以半透性最为重要。
In addition to value, hue and chroma, there are many subtle secondary optical properties of natural human tooth, such as translucency, opacity, iridescence, surface gloss and fluorescence.
确认材质涂层被选中，打开图像面板，调整， 色相对比度。色相值0，饱和度45，明度-85。
With the texture layer selected go to Image>Adjustments>Hue and Saturation. Use 0 for the Hue, 45 for the Saturation and -85 for the Lightness.
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