与圆（x+3）²+y²=1及圆（x-3）²+y²=9都外切的圆的圆心轨迹方程为______．

英汉互译。

1. 在……的前面                         2. in January                        

3. 玩耍                                       4. 上学                                

5. go to work                              6. in  Picture 1                      

7. 在学校附近                            8. 去公园                             

9. far from                                 10. go to bed