清除屏幕

例句：

1. 1. The dust on the windows has to be cleared before we can see clearly.
   在我们能清楚地看到之前，窗户上的灰尘必须被清除。
2. 2. The teacher cleared his throat and began to speak.
   老师清了清嗓子开始讲话。
3. 3. The committee decided to clear the meeting room for a more formal discussion.
   委员会决定清理会议室以便进行更正式的讨论。