This is the basis for the well - known cesium clock, presently the standard of frequency and time.

这就是众所周知的铯原子钟的基础，它是目前的频率和时间基准。

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A new tool that can test the clock base frequency error of energy measuring devices and provide GPS standard time to calibrate real-time clock was introduced in this paper.

介绍了一种用来测量电能计量装置的时钟基频误差，并提供GPS标准时间以校准其实时时钟的新型工具。

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Atomic frequency Standard is the frequency and time benchmark of space technology and time awarding system, directly determining the quality of satellite communications.

原子频标是空间技术和授时系统的频率与时间基准，直接决定了卫星通信的质量。

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The LTE standard supports FDD (Frequency Division Duplexing) mode adopted by DOCOMO and TDD (Time Division Duplexing) mode expected to be adopted for LTE networks in China and other markets, which will help to further the development of advanced mobile devices by manufacturers worldwide.

ENGADGET: Panasonic, DoCoMo, NEC and Fujitsu create IP for multi-standard LSI chip; supports LTE, GSM, W-CDMA and HSPA+