clear a position

例句：

1. 2.
   使
2. 3.
   使
3. 1. The fog cleared up quickly after the rain.
   雨后雾气很快散去。
4. 2. The police cleared the area of any illegal activity.
   警方清理了该地区的所有非法活动。
5. 3. After the surgery, she felt much clearer and more energetic.
   手术后，她感觉好多了，精力也更充沛了。