Ⅰ.重点单词 1. n.探测;探险 v.探测;探险;探索 2. n.小圆点 3. n.祖先;祖宗 4. adv.向外地 adv.向上地 5. n.界线;边界 v.跳跃;限制
exploration
explore
dot
ancestor
outwards upwards
boundary bound