A large amount of firsthanddata have been gained by the field investigation of the carbonate karst of the Ordovician system in the Xishan Hill of Beijing.
通过对北京西山奥陶系碳酸盐岩岩溶的野外调查,取得了大量的第一手资料。
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However, as most Linux kernel testing efforts have only been conducted over short periods of time, this series of tests provides us first-handdata and results of longer runs.
It was the first time that data, voice and video over the hand-held commercial devices were simultaneously transmitted over both 3g and military tactical radios without any interruptions in service.