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- low frequency radio astronomy 低频射电天文学
- LOFT (Low Frequency Radio Telescope) 低频射电望远镜
- propagation of low frequency radio wave 低频电波传播
- propagation of very low frequency radio wave 甚低频电波传播
- propagation of extremely low frequency radio wave 极低频电波传播
- Low Frequency Radio Signatures of Coronal Mass Ejections 日冕物质抛射的低频射电特征
- propagation of extremely low frequency ELF and voice frequency radio wave 极低频与音频电波传播
- propagation of extremely low frequency and voice frequency radio wave 极低频与音频电波传播
- Radio astronomy has greatly increased our understanding of the universe. 辐射天文学大大地增进了我们对宇宙的了解。
- 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。
- In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply. 在电子学领域，一种不希望发生的低频电流，它干扰所要求的信号。通常这种现象是由于交流供电线路屏蔽不良引起的。
- The development of the technical infrastructure for radio astronomy through training in techniques. 通过技术训练逐步完善射电天文的技术支撑队伍。
- In none of these respects does optical astronomy have any advantage over radio astronomy. 在所有这些指标上，射电天文并不比光学天文逊色。
- A new science, Radio Astronomy, has emerged, and it is very closely allied to astronomy, astro-physics and physics. 出现了一门新兴学科----无线电天文学，它与天文学、天文物理学和物理学关系密切。
- The abnormal colours of seedlings turned a low frequency. 颜色异常的苗木出现频率较低。
- The mass of one of these suppressive black holes has recently been measured using radio astronomy. 这些有着巨大质量的黑洞，最近利用了射电天文学来测量它们的质量。
- Laser direct writing of micro-OVD with low frequency templates[J]. 引用该论文 魏国军;周小红;周雷;陈林森.
- He Baoyu (Aerocraft Design)Directed by Wu JiSynthetic aperture technology in radio astronomy is introduced into microwave radiometer since 1980's. 八十年代以来，为改善微波辐射计性能，人们将射电天文观测中的孔径综合技术引入到微波辐射计设计中，开始了综合孔径辐射计的研究。
- This high frequency alternating current produces the high frequency radio waves mentioned in the previous chapter. 这种高频交流电流产生前一章提到过的高频无线电波。
- This effect is obvious at lower frequency band. 这种效应在振动低频区段更为显著。
