redul糖降嘧啶钠redadj.红色的n.红色reducible curve可约曲线red copper wire紫铜线reducing factor简化因数,折合因数,实积形数red-top booth红顶小房red clay ground红粘土地基red lead powder红丹粉red fiber sheet红色硬化低板Red-bud Maple红芽槭(槭树科)red ground tile红地砖red head series红崖统