1. 星云的：nebulosity 星云状态 | nebulous 星云的 | necessarian 必然论

2. 模糊的：mutter咕哝 | nebulous模糊的 | nebula星云

3.

3. 星云的 星云状：nebulosus 薄幕状云 | nebulous 星云的 星云状 | nebulouscluster 伴云星团

1. 模糊的;蒙的
    If you describe something as nebulous, you mean that it is vague and not clearly defined or not easy to describe.

    e.g. The notions we children were able to form of the great world beyond were exceedingly nebulous...
           我们这些孩子所能形成的对外部世界的认识是非常模糊的。
    e.g. Music is such a nebulous thing.
           音乐是如此蒙之物。