bichrome

1.Qualcomm's initial products are only bichrome—black lettering on a background of, say, gold.

高通品只有单色──在背景色（例如金色）上显现黑色。

2.The optimal conditions for synthesis of alkali green 4 are reported,including the carbamide and zinc chloride as catalyst,chloranil and bichrome as oxidation agent in the acetic acid medium.

报道了合成碱绿-4佳条件:在醋酸介质中,尿素、氯化锌为催化剂,四氯苯醌和重铬酸钾为氧化剂;