其点扩展函数分为一次射线点扩展函数和散射点扩展函数两部分。
The point spread function consists of prime point spread function and scatter point spread function.
之前所知最遥远的天体是一次短期的伽玛射线暴。
The previously known most distant object was a short-lived gamma ray burst.
这幅图像显示了M 87大质量星系里的一次极大的“超级火山”喷发。NASA的钱德拉X射线望远镜和国家科学基金会(nsf)的超大阵列(VLA)目击了此景。
This image shows the eruption of a galactic "super-volcano" in the massive galaxy M87, as witnessed by NASA's Chandra X-ray Observatory and NSF's Very Large Array (VLA).
把费米直接去监察一次雷暴雨，以便能观察到大多数的伽玛射线闪光，但在有些情况下，风暴已远远地离去。
Fermi was located immediately above a thunderstorm for most of the observed gamma-ray flashes, but in several cases, storms were far away.
在上个月这颗亮星经历一次大规模光学爆发的时候，我们在它所在的方向上发现了一次伽马射线爆发。
Last month, we discovered a bright gamma-ray flare from the direction of this star while it was undergoing a huge optical outburst.
根据古巴一个团队的研究结果，一次袭击地球的宇宙中伽马射线爆，对于深至75米的浮游生物仍然是有害的。
A cosmic gamma-ray burst striking the Earth could be harmful to ocean plankton at depths of up to 75 m, according to a team of Cuban researchers.
参与者被随机地指定做一种每年一次共三次的影像学检查——低剂量螺旋CT或标准X射线胸透。
Participants were randomly assigned to receive three annual screenings with either the low-dose spiral CT or the standard chest X-ray.
其中的创造之柱再一次成为钱德拉X射线天文台的拍摄目标，结果发现许多EGGs发射的X射线并不强。
The pillars of creation were again imaged by the orbiting Chandra X-ray Observatory, and it was found that most EGGS are not strong emitters of X-rays.
2008年望远镜发射升空后不久，当我们第一次启动它的时候，在新近观察到的伽马射线天空中发现了一个出乎意料的明亮物体。
Shortly after launch in 2008, when we first turned on the telescope, we noticed an unexpected bright object in the newly observed gamma-ray sky.
超新星爆发后留下了一个直径12.5英里的致密核心，NASA的钱德拉X射线天文台于1999年第一次观察到了这一核心。
The supernova left behind a dense central core 12.5 miles wide that was first spotted in 1999 by NASA's Chandra X-ray Observatory.
NLST则是第一次包含大量随机指定的受试者的实验，使得在螺旋CT成像和X射线胸透之间做死亡率的比较成为了可能。
The NLST is the first trial with sufficient numbers of participants using a randomized design to enable the comparison of mortality differences between spiral CT and chest X-ray, Aberle said.
效果：每轮一次，以一个标准动作，此生物可以将其中一条眼球射线以超魔专长的效果增强。
Benefit: Once per round, as a standard action, the creature can enhance one of its eye rays with the effect of a metamagic feat that it possesses.
在我们的星系中，大约每一千万年会发生一次伽马射线爆。
GRBs are likely to happen in our galaxy around every 10 million years or so.
史密斯探测公司是全球技术商业史密斯集团的一部分，日前，该公司宣布了其先进技术x射线系统在美国的第一次部署。
Smiths Detection, part of the global technology business Smiths Group, announced the first deployment of its Advanced Technology (AT) x-ray systems in the United States.
单个的粒子可以在一次伽马射线闪光中获得巨大能量，有时会超出二十兆电子伏特(MeV)。
Individual particles in a TGF acquire a huge amount of energy, sometimes in excess of 20 mega-electron volts (MeV).
X射线第一次被观察和记录是在1895年，当时德国科学家威尔姆·康拉德·伦琴在使用真空管做实验时意外发现了X射线。与光线和无线电波一样，X射线也是一种电磁辐射。
X-rayswere first observed and documented in 1895 by Wilhelm Conrad Roentgen, a Germanscientist who found them quite by accident when experimenting with vacuumtubes.
哈佛史密森天文物理中心、钱德拉X射线天文台新闻处的科学家彼得·埃德蒙兹说，1992年第一次观察到爆炸现象，尽管爆炸减弱了，但是一直可以看到。
The blast first was seen in 1992 and remains visible as it fades, said Chandra press scientist Peter Edmonds, of the Harvard-Smithsonian Center for Astrophysics.
但是，这是她们第一次听到自己住家地区有高含量放射线的消息。
But this is the first time they have heard about a high level of radiation in their own neighborhood.
哈勃望远镜捕捉到的这张照片显示的是1999年1月23日伽马射线爆炸的景象。这是当时人们纪录过的最大规模的一次伽马射线爆炸。
The Hubble Space Telescope captured this image of a gamma ray explosion on January 23, 1999. At the time it was the most powerful explosion ever recorded.
最经典的例子就是天鹅座X-1，这是在天鹅座星云中发现第一次发现的X射线源。
One of the best cases known goes by the name Cygnus X-1, because it was the first X-ray source discovered in the constellation Cygnus the Swan.
最经典的例子就是天鹅座X-1，这是在天鹅座星云中发现第一次发现的X射线源。
One of the best cases known goes by the name Cygnus X-1, because it was the first X-ray source discovered in the constellation Cygnus the Swan.
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