upper first meaning in English
上部起点
Examples
- The long axises of miniature pigs teeth are 6 . 1 in the upper first molar , 6 . 5 in the lower first molar , 7 . 3 in the upper third premolar , 3 . 8 in the lower third premolar
结论小型猪咀嚼肌的形态、起止点、肌力方向都与人类有较大的相似性；第三前磨牙与第一磨牙长轴为近中倾斜，与人类第一前磨牙和第一磨牙近似。