星云的

The study found the benthic diatom Epithemia sorex and Cocconeis klamathensis were the dominant indicator taxa separately in the Lake Luguhu and Fuxianhu, Amphora pediculus was the most abundant species in the Lake Yangzonghai and Dianchi-gingbao, There were a lot of the dominant taxon in the Lakes Erhai, Xingyunhu, Dianchi-youyicun, whereas the higher relative abundance taxon in these lakes were epilithic.

分析不同湖泊底栖硅藻的群落结构发现：底栖硅藻Epithemia sorex和Cocconeis klamathensis分别是沪沽湖和抚仙湖的绝对优势种，Amphora Pediculus是阳宗海和滇池金宝的绝对优势种，洱海、星云湖和滇池又一村的优势种类较多，其中相对丰富度较高的主要是一些附植性种类。

Now, almost a thousand years later, a super dense object -- called a neutron star -- left behind by the explosion is seen spewing out a blizzard of high-energy particles into the expanding debris field known as the Crab Nebula.

几乎是1000年后，一个超级密集的对象-被称为中子星-爆炸后的背景，也就是我们现在熟知的蟹状星云是其喷射出的高能粒子形成的区域。

Portraits of the Crab Nebula captured in visible, infrared, and x-ray wavelengths are projected on screens in Monument Valley, Utah, in a long exposure beneath a star-filled sky.

以可见光、红外线和X射线波段拍摄的蟹状星云图像被投射在犹他州的纪念谷里的屏幕上，图片是在一片布满星星的天空下使用长时间暴光拍摄的。

A pulsar is a celestial object that emits light in short burst a pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the rotation of a spherical object that emits light from a pair of diametrically opposed "flashlights" on its equator.

脉冲星是一种以短爆发形式辐射光的天体。假设球型天体赤道面上有一对"发光塔"，并且这对发光塔的联线构成赤道面的直径，进一步假设光脉冲产生于球形天体的转动，那么巨蟹座星云中的一个脉冲星的闪光频率是每秒30次。

The satellite, called WISE, is the most sensitive detector of infrared radiation ever sent into orbit and will seek out objects in the dark spaces between stars and planets, dust clouds, asteroids and suns that have cooled down.

这颗叫" WISE "的卫星是目前发射到空中的最敏锐的红外线侦察机，它能够在恒星，行星，星云，小行星，冷却的恒星之间的黑暗空间里寻找物体。

I'm sure there is a very wise and wonderful Being who designed, constructed, and operates this existence as we mortals know it: this universe with its galaxies and spiral nebulae, its stars and moons and planets and beautiful women, its trees and pearls and deep green moss—and its hopes and prayers for peace.

我确信有一位非常睿智和神奇的神灵设计、建造并统治这个世界，就像我们凡人所认识的样子：这个宇宙有星群、螺旋型的星云、星星、月亮、行星、美女、树木、珍珠和深绿的苔藓，还有希望和对和平的祈祷。

Fantastic ridges and swept back shapes strongly suggest that energetic radiation and shock waves from NGC 602's massive young stars have eroded the dusty material and triggered a progression of star formation moving away from the cluster's center.

梦幻的脊状尘埃和云气说明了在NGC 602 里面，从大质量年轻恒星发出的高能的辐射和震波已经影响到附近的尘埃，并从星云中心往外触发了一连串的恒星形成。

The possibility that stellar evolution of either Sirius A or Sirius B could be responsible for this discrepancy is rejected by astronomers on the grounds that the timescale of thousands of years is too short and that there is no sign of the nebulosity in the system that would be expected had such a change taken place.

恒星演化的可能性要么是天狼星A要么是天狼星B造成的差异，地球上科学家不认可这种看法，数千年的时间刻度太短，在系统内没有星云状物的迹象，在这系统内认为这可能性会发生的。

A planetary nebula is the glowing gas around a dying , Sun-like star .

行星的星云是在死，象Sun 一样的星周围的发光的气体。

The Small Magellanic Cloud pictured above actually spans 15,000 light-years or so and contains several hundred million stars.

但这张远视图片中生动的颜色是人工绘色的，是基于通过狭窄滤波片的三种曝光，每一个滤波片记录下气态星云中特殊原子放射出的光。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷