通过改变黑色线条或者铰链的宽度，研究员可以改变每条铰链可以折叠的范围。
By varying the width of the black lines, or hinges, researchers are able to change how far each hinge folds.
在皮肤开始变黑之前，黑色素就有可能提供最及时的紫外线防护。
This is likely to provide rapid protection against UV damage, long before the skin starts to tan.
亮丽的颜色是高度饱和的色素，他们不是稀释变黑的黑色或者白色。
Bright colors are highly saturated with pigment. They are not diluted by white or darkened by black.
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