直: straight; stiff员: a surname直圆盘犁: wheatland harrow plow直原: chokuhara; jikihara; yukihara直圆锥: cone of revolution直元: naomoto; tadamoto直缘: straight edge直誉: naoyo直缘双蚤: amphipsylla tuta直喻: [语言学] simile直缘型: rectimarginate直与平面的交角: angle between a line and a plane
