• 清楚的头脑
• 清醒的头脑

clearoutn.清理clearadj.清楚的；明确的；明白(某事)的；清晰的；清澈的；晴朗的；头脑清醒的v.清空；清除；澄清；放晴；使明确adv.清楚地；彻底地n.空地clearing house funds清算所基金,票据交换所资金clear liquid shampoo洗发清液clearscommandhistory清除命令历史clear the theater.剧院清场Clear-winged Moths透翅蛾(鳞翅目,透翅蛾科)clear the atmospherevi.消除误会(消除紧张气氛)clearing house agent[经] 票据交换所代理人clear valve diameter阀孔径clear air turbulencen.晴空湍流clear away obstacles排除障碍

1. My mind was clarified on this issue.
   对这个问题我的头脑变得清楚了。
2. Denner had a mind as sharp as a needle.
   登纳有一副精明的头脑。