星云的英文：
nebula
- The element hydrogen comprises 90% of the matter in gaseous nebulae
元素氢占气体星云物质的90%。 - galactic nebulas are masses of diffuse material within our galaxy
银河星云是我们星系中的一团团弥散物。 - For the Galaxy and the andromeda nubula, they do not form a pair of galaxies completely isolated from all others
对银河系和仙女座星云来说，它们并不构成与所有其他星系完全孤立的一对星系。 - These sources are generally viewed in projection against radio nebulae representing the remnants of supernova outbursts
这类源一般都投影在超星爆发残骸的射电星云上。 - The spiral nebulae are impressive objects.
旋涡星云是迷人的天体。 - The spiral nebulae are impressive objects
旋涡星云是迷人的天体。 - You can see nebulae in the clear summer sky
在晴朗的夏夜可以看到天上的星云。 - The element hydrogen comprises 90% of the matter in gaseous nebulae.
元素氢占气体星云物质的90%。 - The remnant nebular gas pervades the interplanetary space
星云的残余气体充斥星际空间。 - Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness
旋涡星云因为非常暗，难以得到它们的清晰的光谱。
n. 星云,云翳
- The spiral nebulae are impressive objects.
旋涡星云是迷人的天体。 - The element hydrogen comprises 90% of the matter in gaseous nebulae
元素氢占气体星云物质的90%。 - The element hydrogen comprises 90% of the matter in gaseous nebulae.
元素氢占气体星云物质的90%。 - galactic nebulas are masses of diffuse material within our galaxy
银河星云是我们星系中的一团团弥散物。 - Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness
旋涡星云因为非常暗，难以得到它们的清晰的光谱。