To prostrate oneself at the sight of dust raised by a powerful person's approach, signifying extreme obsequiousness and servility.
他为了得到这个项目的支持，对负责人简直是妄尘而拜，一副低三下四的样子。
In order to gain support for this project, he practically prostrated himself before the person in charge, showing an extremely obsequious attitude.
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