太空里的通讯却伴随着特殊的电信号跳变，因此需要一个“储存和转送”系统以保证在通讯过程的每一步都不会有信息丢失。

Space communication happens in distinct jumps, and requires a “store and forward” system that can retain information at each step in the process.

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2月14日太阳爆发了四年以来最大的太阳耀斑——大到足以干扰无线电通讯和长途客机的全球定位系统信号。

On February 14 the sun erupted with the largest solar flare seen in four years-big enough to interfere with radio communications and GPS signals for airplanes on long-distance flights.

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固定频率源可以在在通讯系统和雷达系统中作为本机振荡器，也可以作为数字电路的基准时钟信号，因此得到了广泛的应用。

Single frequency source is usually used as local oscillator in communication system and radar system, also as a reference clock in digital circuits, so it is a extensive-applied technique.

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