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.
他的眼睛变黑色，而且他打开了他的嘴显示，乔渴望越过他的唇凸出的犬齿。
His eyes went black and he opened his mouth to show Joe long canines that protruded past his lips.
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.
大概在它长到三个月大时，它的毛色就会开始变黑。到六个月大时，就已经全部变成黑色了。
Its fur will begin to darken at around three months of age, and they are usually completely black by the time they reach six months old.
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.
突然，天空变黑了，我抬头看到黑色的乌云。
Suddenly, the sky becomes dark. I look up and see dark storm clouds.
彻底美白？纯净美白因子有效淡化肤色，调节导致肌肤变黑的黑色素形成，有助改善晦暗肌肤，使肌肤变得洁白无瑕，焕发净。
Thoroughly whiten: Pure whitening factor can effectively fade tone, restrain the production of melanin, powerfully fade dull tone and make skin white, clear and shining.
因此木材受霉菌和蓝变菌侵染而变黑是由真菌分泌的黑色素所产生。
Therefore the stains in wood infected by mold and blue-stain fungi were supposed to be due to the presence of melanins secreted by these fungi.
黑色素使皮肤变黑是人被晒黑的原因。
去除皮肤表层的老化细胞，有效抑制黑色素生成，防止肌肤变黑，使肌肤回复自然白皙；
Peel off aged cells from epidermis, effectively inhibit melanin, protect skin from dull tone, and recover skin to natural and white state;
去除皮肤表层的老化细胞，有效抑制黑色素生成，防止肌肤变黑，使肌肤回复自然白皙；
Peel off aged cells from epidermis, effectively inhibit melanin, protect skin from dull tone, and recover skin to natural and white state;
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