词典释义：
(of a photograph, film, television programme, or illustration)in black, white, shades of grey, and no other colour
（照片、胶卷、电视节目或插图）黑白的
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old black-and-white movies. 老的黑白电影。
(of a television)displaying images in black, white, and shades of grey
（电视）黑白的。
(of a situation or debate)involving clearly defined opposing principles or issues
（形势或争论）是非分明的，正反明确的，黑白分明的
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it was all grey areas; no black-and-white certainties. 那全是灰色地带；根本不分是非曲直。
〈美，非正式〉 警车。
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in black and white 1 in writing or in print （regarded as more reliable, credible, or formal than speech） 白纸黑字的，书面的，非口头的she had abandoned all hope of getting her contract down in black and white. 她对以书面形式把合同确定下来已不抱任何希望了 -
2 in terms of clearly defined opposing principles or issues 非对即错，非好即坏children think in black and white, good and bad. 孩子们认为一切不是黑就是白，不是好就是坏
