Behind it, lingular arterialtrunk arised from left inferior lobar artery.
其后方，舌动脉干发自左肺下叶动脉。
2
The radial artery and the ulnar artery coincide with each other to form a palm artery arch. The arterialtrunk gives off branches to the related parts.
挠动脉与尺动脉互相吻合成掌动脉弓，动脉干沿途发出分支至相应部位。
3
Urban arterial road is the main undertaker for the urban transportation. The transportation capacity can be improved by combining and controlling many intersections in one trunk road.