Color-blind people often find it difficult to distinguish between blue and green.
色盲的人经常发现很难区分蓝色和绿色。
I explained that it signals to blind people when the light is green.
我说，这是给盲人的绿灯信号。
Some people can't tell red from green, as they are color-blind.
有些人分别不出红色和绿色，因为他们患有色盲症。
Some people can't tell red from green, as they are color-blind.
有些人分别不出红色和绿色，因为他们患有色盲症。
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