clear of cloud meaning in Chinese

云外

The sky is now clear of clouds .
现在天晴了。
The flight was conducted under special visual flight rules , which require the pilot to remain clear of cloud and in visual contact with the surface
该次飞行是按照特殊目视飞行规则进行；根据该规则，飞行员须一直离开云层并能目视地面。
I used to look at my master s face to see if it were sad or fierce ; but i could not remember the time when it had been so uniformly clear of clouds or evil feelings
我常常观察我主人的脸，看看是不是有伤心或恼恨之情，但是在我的记忆中，他的面部从来没有像现在这样毫无愁容或怒色。