“mask earth point before spraying”这句话是什么意思？

at one point是什么意思，有什么用法？

在一个点上,,,,在这个意思上 复数: POINTS 同意词: MISSION 用电: A POINT OF HONOUR GOAL AT ALL POINTS AIM AT SWORDS POINTS END AT THE POINT OF PURPOSE AWAY FROM THE POINT BE ON THE POINT BESIDE THE POINT ...全部

  在一个点上,,,,在这个意思上 复数: POINTS 同意词: MISSION 用电: A POINT OF HONOUR GOAL AT ALL POINTS AIM AT SWORDS POINTS END AT THE POINT OF PURPOSE AWAY FROM THE POINT BE ON THE POINT BESIDE THE POINT 例句: THE POINT OF A NEEDLE IS SHARP。
   CATCH THE POINT OF WHAT HE SAID WAS BESIDW THE POINT。 CAME TO THE POINT STOP AT THAT POINT。
   FROM POINT TO POINT WHAT IS SHE POINTING AT。 IN POINT GROW TO A POINT KEEP TO THE POINT 。
  收起