下唇lower lip
权力下放delegate power to the lower levels; shift of power to the grassroots
低位肠的克隆氏病lower intestinal Crohn's disease
双面定厚砂光机upper-lower sanding-ga(u)ging machine【木】
右下腹right lower quadrant
下肢lower limb
双下肢both lower extremities
下焦水寒lower burner water-cold