Darken.达克darkadj.黑暗的；深色的n.黑暗；暗处；深色调v.使变黑；变黑dark heart暗色心材dark veins内菌脉dark bread黑面包dark period阴影周期dark yellow暗黄色Dark shales黑色页岩dark menses经色紫暗dark casket暗匣子dark thread隐晦的威胁dark energy暗能量