射电天文学在过去的十年里在物质的宇宙打开了一扇新的窗户。
Radio astronomy has in the last decade opened a new window on the physical universe.
它是人们于1951年发现的太空氢原子的天然发射频率，宇宙间任何一种射电天文学家都必定知道它。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951; it must be known to any kind of radio astronomer in the universe.
它是人们于1951年发现的太空氢原子的天然发射频率，宇宙间任何一种射电天文学家都必定知道它。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951; it must be known to any kind of radio astronomer in the universe.
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