You can see nebulae in the clear summer sky.

在晴朗的夏夜可以看到天上的星云.

《简明英汉词典》

The brightness of the nebula at this stage is inversely proportional to its mass.

这个阶段星云的亮度与其质量成反比。

金山词霸

The element hydrogen comprises 90 % of the matter in gaseous nebulae.

元素氢占气体星云物质的百分之九十.

辞典例句

Some nebulae appear to be completely engulfed by exceedingly large molecular clouds.

有些气体星云似乎被极其巨大的分子云完全包围.

辞典例句

A powerful telescope can resolve a nebula into stars.

一架高性能的望远镜能从星云中分辨出星球来.

辞典例句

The investigation of dark nebulas has been facilitated by a new discovery.

对暗星云的研究被一种新发现所推进.

辞典例句

This suggest that the nebulas are aggregates of stars.

这说明星云是恒星的聚集体.

辞典例句

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.

辞典例句

A nebula is really a discrete mass of innumerous stars.

一团星云实际上是无数星体不连续的集合体.

辞典例句

Many objections can be raised to this picture of planetary nebula formation.

形成行星状星云的这一图象可能会引起许多异议.

辞典例句

The remnant nebular gas pervades the interplanetary space.

星云的残余气体充斥星际空间.

辞典例句

Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry.

行星状星云是一类孤立的气体星云,具有相当程度的双侧对称性.

辞典例句

Such tumultuous, often visually spectacular, interstellar regions surrounding youthful stars are known as gaseous nebulae.

这种环绕着年轻星的动荡且常常是壮观的星际区域,叫做气体星云.

辞典例句

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.

辞典例句

The filaments are expanding into space at a speed of roughly 5,000 kilometers per second.

这些纤维状星云物质以每秒大约5000公里的速度向宇宙空间扩展.

辞典例句