lacking hue or shades of grey; part white and part black;
"a black-and-white cow" "black-and-white blooms" "black-and-white stripes"
not having or not capable of producing colors;
"black-and-white film" "a black-and-white TV" "the movie was in black and white"
of a situation that is sharply divided into mutually exclusive categories;
"he rejected a black-and-white world" "there are no black-and-white certainties" "there were no grey areas, you were either for him or against him, he was all black-and-white"
Colour receivers are still much more expensive than black and white sets. 彩色接收器仍比黑白的贵得多。
From the simulation results, Ch-LCD with UV band Ch-LC can be wide band reflection, thus, enabling a black and white display. 从模拟的结果得知，使用反射紫外光波段的胆固醇液晶显示器可以具有宽频谱的反射而成为黑白的显示器。
