within the four seas

例句：

1. 1. Thebook is within reach of the desk.
   这本书在桌子的范围内。
2. 2. He sat within his seat and didn't look up.
   他坐在座位里，没有抬头看。
3. 3.She moved her chair within the circle of light.
   她把她的椅子移到光线的圈子里。