星系

The chemical evolution of galaxies is a long-interesting problem for astrophysicist.

星系化学演化也是天文学者一直关心的问题。

"The observation of this group of galaxies that is almost devoid of dark matter flies in the face of our current understanding of the cosmos," said Dr. Arif Babul, University of Victoria.

"对这没有暗物质的星系群的观测几乎是反驳了我们目前对宇宙图景的认识，"维多利亚大学的Dr。

"The observation of this group of galaxies that is almost devoid ofdark matter flies in the face of our current understanding of thecosmos," said Dr. Arif Babul, University of Victoria.

"对这没有暗物质的星系群的观测几乎是反驳了我们目前对宇宙图景的认识，"维多利亚大学的Dr。

A redshift can be measured when light from a galaxy is broken up and spread out into a band of colors called a spectrum.

当从星系发出的光被分解展开成光谱的时候就可以测出红移了。

With 1 million galaxies to identify, I suspect the organizers are going to be shocked at how quickly this work is going to come together.

尽管有一百万个星系需要来鉴别，我怀疑组织者是否会被这项工作的快速进行而感到惊讶。

In our galaxy showing up 300,000 years after the Big Bang.

在大爆炸后在我们的星系里已经有了30万年了

Head to tail type: front is a dense source of the corresponding optical galaxy, and then there are several pairs of gradually increasing bijection of electronic sources and dragged gradually widened the scope of the spectrum index steepens, the intensity gradually weakened radio tail.

头尾型：前面是一个有光学星系对应的致密源，随后有几对逐渐增大的双射电子源并拖着范围逐渐增宽、频谱指数逐渐变陡、强度逐渐减弱的射电尾巴。

It is one of billions of galaxies in the observable universe.

这是我们目前可以观测到的宇宙中数以亿计的星系中的一个。

Also the reasonable model parameters, such as the metal yield and the stellar initial mass function, make it possible to re-produce the observed bimodal distribution of the color-magnitude diagram.

我们选取的合理的参数，如金属产率，恒星初始质量函数等使得我们能预言星系颜色分布的双峰结构。

The most convincing evidence of black holes comes from research into binary star systems.

有关黑洞的最有说服力的证据来自对双星系的研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。