Darken.达克darkadj.黑暗的；深色的n.黑暗；暗处；深色调v.使变黑；变黑Darkshevich?s fibersdark stripe深色的条纹dark colour深色dark-spot黑斑dark saying意义不明的话, 暗语dark-burnn.烧暗；发光效率降低dark ground暗视场,暗视野dark future暗淡的前景dark tipped(芽)尖端褐变的dark mildew烟霉,煤烟病