in black and

in black and white[英][in blæk ænd hwait][美][ɪn blæk ənd hwaɪt]白纸黑字; He says seeing his diagnosis charted in black and white made a big difference tohim。他说,看到他那被绘制成黑白的诊断结论给了他很大的影响（ct图就是黑白的）如有不懂,