1.
The process of becoming black or dark.
变黑变黑或变暗的过程
2.
To be or become dark, shaded, or obscure.
变黑，变暗，变得模糊
3.
Melanin darkens the skin and is the cause of suntan.
黑色素使皮肤变黑是人被晒黑的原因。
4.
To make dark, shaded, or obscure.
使变黑，变暗，使模糊
5.
The quality or state of being opaque.
黑暗变暗或变黑的性质和状态
6.
the stomach mucosa was irregularly blackened.
胃粘膜成不规则状变黑。
7.
Buildings often darken as they get older.
建筑物时间长了会变黑。
8.
the sun darkened ominously.
太阳变黑了，很不吉利。
9.
"The mutation was corrected," said Alexeev.
"突变被纠正了，毛发就变黑了。
10.
Dark coloration of the skin, hair, fur, or feathers because of a high concentration of melanin.
黑色素沉着病头发、皮肤、毛皮或羽毛因黑色素沉积而变黑
11.
(of wood) darkened or colored by exposure to ammonia fumes.
（指木头）接触到氨气而变黑或有色。
12.
Of, relating to, or exhibiting melanism.
黑变的黑变的，有关黑变的，显示黑变症状的
13.
Of or affected with melanosis.
黑变病的黑变病的或受黑变病影响的
14.
Of, relating to, or affected with melanosis; melanotic.
黑变病的黑变病的，有关黑变病的，患黑变病的，黑素代谢失常的
15.
make dark, dim, or gloomy.
使变得黑暗淡或黑暗。
16.
Thick clouds darkened the sky before the rain fell.
在下雨之前,黑云使天空变得黑暗了。
17.
A sudden silence fell upon the crowd.
突然那乌黑黑的人层变做了哑噤。
18.
Study of the Origin of Melanin on Neurocutaneous Melanosis
神经皮肤黑变病中黑色素的来源初探