late 14c., "cloudy, misty," from Latin nebulosus "cloudy, misty, foggy, full of vapor," from nebula (see nebula). The figurative sense of "hazy, vague, formless" is first attested 1831. Astronomical sense is from 1670s. Related: Nebulously; nebulousness.
实用例句
1. Music is such a nebulous thing.
音乐是如此蒙之物。
来自柯林斯例句
2. 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。
来自辞典例句
3. The evening films began to make nebulous pictures of the valleys.