leave without notice meaning in English

擅自离去, 不告而别

What had happened? had he been fired? -asked to leave without notice ?
发生了什么事？他被解雇了吗？--事先没有消息就突然被辞退了吗？
It was impolite taht she left without noticing us
她不向我们打声招呼就走了，这是非常不礼貌的。
He left without notice
他不辞而别。
What had happened ? had he been fired ? - asked to leave without notice
发生了什么事？他被解雇了吗？ - -事先没有消息就突然被辞退了吗？