Rods and cones detect light, darkness, shape and colour, and make normal sight possible.
其中柱体和锥体感受器可以感受光亮与黑暗，形状与颜色，形成正常的视觉功能。
In normal tissues has good elasticity, pressure after soon restore original shape and color.
正常组织的弹性好，压过后很快即恢复原有的形状及色泽。
In normal tissues has good elasticity, pressure after soon restore original shape and color.
正常组织的弹性好，压过后很快即恢复原有的形状及色泽。
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