短語詞組短語frontal trace line 正面跡線frontal gland line 正平線non -frontal squall line 非鋒颮線pre -cold-frontal squall line 冷鋒前颮線;鋒前颮線frontal line player 鋒線球員frontal line on a plane 平面上的正平線frost -heaving frontal line 凍脹冰鋒線temporal line of frontal bone 額骨顳線semicircular line of frontal bone 額骨顳線;額骨半環(huán)線 返回 frontal line