视界上的颜色并非只有白色和黑色，黑与白之间还有很漫长的灰色地带。

Field of vision is not only the colour white and black, between black and white there is a long grey areas.

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奥巴马是在穿梭于截然不同的世界之间成长的，他学会如何在黑与白、异乡与美国、富与贫之间穿梭自如。

Barack Obama grew up learning how to slip in and out of different worlds - black and white, foreign and American, rich and poor.

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