Scientists found that such melanocyte stem cells lacked a crucial enzyme that was present in similar stem cells found in the skin, which do not lose colour with age.
科学家发现这种黑素细胞干细胞缺少一种至关重要的酶，这种酶存在于在皮肤里发现的类似的干细胞里，而皮肤不随着年龄褪色。
Just as some people are born colour-blind, or lose colour vision after a brain injury, others are "number-blind" : unable to comprehend what everyone else sees effortlessly.
正如一些人是先天性色盲或者脑部受损后失去颜色知觉，世界上也存在另一些人患有“数字盲”：即无法理解那些平常人觉得毫不费力的事物。
Foods which go through a factory process lose much of their colour, flavour and texture.
经过工厂加工的食品会失去许多色泽、味道和质地。
The reefs then lose their colour and become more susceptible to death from starvation or disease.
珊瑚礁会失去颜色，比饥饿和疾病来的时候更容易死亡。
The plant detects the substance and activates an internal signal that causes it to lose its green colour, turning its leaves white.
当植物监测到那些有害物品时就会激发内信号，使叶子从绿色变成白色。
Do not overcook as you will lose the nutrients and colour with prolonged cooking.
不要烫煮得太久，否则会因此失去营养和色泽。
Do not overcook as you will lose the nutrients and colour with prolonged cooking.
不要烫煮得太久，否则会因此失去营养和色泽。
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