1.
high-energy and low-energy gamma-ray astronomy
高能与低能γ射线天文学
2.
X-ray astronomy has made impressive progress.
X射线天文学已取得了引人注目的进展。
3.
contribute little to either ultra- violet astronomy or X-ray astronomy.
所以气球携带的仪器对紫外线天文学或Ｘ射线天文学的贡献是不大的。
4.
The renowned American satellite Uhuru exemplifies the capabilities of X-ray astronomy.
著名的美国“乌呼鲁”卫星充分显示了X射线天文学的威力。
5.
Radio astronomy today is armed with the largest antennas in the world.
射电天文学拥有世界上最大的天线。
6.
spectral line receiver in radio astronomy
射电天文谱线接收机
7.
the branch of astronomy that detects and studies the radio waves emitted by celestial bodies.
天文学中对天体发射无线电波的侦察与研究的分支。
8.
The Status of Very High Energy and Ultra High Energy Gamma Ray Astronomy Observation
甚高能和超高能γ射线天文观测现状
9.
balloon-based radio astronomy
气球观测无线电天文学
10.
Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye.
被望远镜的透镜或反射镜所收集的光线，如今直接射到照相底板上，而不是天文学家的眼睛里。
11.
low-altitude dish
低辐射天线，低仰角天线
12.
A new backfire antenna is developed. The reflector of a short backfire antenna has a new feed -- monofilar backfire helix.
本文提出一种新式背射天线,它把单线背射螺旋作为短背射天线的馈源。
13.
Bachelor or above, Major in the antenna or RF field.
本科以上学历，天线或射频相关专业.
14.
Research Teaching in the Radio Frequency Circuit and Antenna Course
“射频电路与天线”课程研究性教学
15.
A new backfire antenna fed by a bifilar backfire belix is described in this Paper.
本文提出一种用双线背射螺旋作馈源的新式背射天线。
16.
A theory is presented for the frequency responses of backfire helical an- tenna.
本文叙述了背射模螺旋天线的频率响应理论。
17.
a leading American radio-astronomer,
美国一位重要的射电天文学家,
18.
A powerful X-ray blast drew the attention of astronomers to the event, located near the center of a galaxy about 700 million light-years from Earth.
强烈的X射线爆炸引起天文学家们的注意，它发生在到离地球大约7亿光年的星系中心附近。