clear the atmosphere

例句：

1. 3. 使
   声音、视线等
2. 1. The fog cleared up quickly after the rain.
   雨后雾气很快散去。
3. 2.The scientist used a powerful microscope to clear up the mystery of the virus.
   科学家使用一台强大的显微镜来解开病毒的谜团。
4. 3.The new policy aims to clear up the confusion surrounding the issue.
   新政策旨在澄清围绕该问题的种种疑惑。