室外工作時，從上風處開始進行；室內工作時，由內到外移動，朝內噴霧。

室外工作時，從上風處開始進行；室內工作時，由內到外移動，朝內噴霧。

結果 (英文) 1:

When working outdoors, start from the upper wind; when working indoors, move from inside to outside and spray inward.

結果 (英文) 2:

When working outdoors, start from the upper wind, and when working indoors, move from the inside out and spray inwards.

結果 (英文) 3:

When working outdoors, start from the windward; when working indoors, move from inside to outside and spray inside.