右上下导数right-hand upper lower derivative【数】
低位肠的克隆氏病lower intestinal Crohn's disease
【纺织；造纸】圈结线线轴、用于下部纱线的线轴looper thread bobbin, bobbin for lower thread
食道下部高压区lower(esophageal)high-pressure zone
右下腹right lower quadrant
下肢lower limb
下齿痛aching among the lower teeth
双下肢both lower extremities