At present, the main data sources in geological application are digitized traditional geological maps because of computer commonly used in geology researches.
由于计算机在地质研究中的大量运用，传统地质图件的数字化成为目前许多应用的主要数据来源。
Measuring the quality factor G/T of a ground receiving system with cosmic radio sources is a method commonly used in most earth stations.
利用宇宙射电源测量地面接收系统品质因数G／T值是大多数地球站普遍采用的测量方法。
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