"黑白灰"是个多义词，它可以指黑白灰（美术中的黑白关系）,黑白灰（香港歌手方大同演唱歌曲）,黑白灰（陈奕迅2003年发行专辑）。
而现在，我发现简单的黑白灰就足以使我心动。
And now I found a simple black and white ash is enough to make me move.
整体与比较；观察方法；黑白灰色调；因材施教。
Whole with comparison; Observation method; The black and white gray adjust; Teach according to his ability.
赵力：敦煌壁画的颜色非常丰富，但“供养人”更多是黑白灰的微妙变化。
Zhao Li: the color of Dunhuang fresco is very profound, but "the Providers" shows more refined variations of black, white and gray colors.
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