There are four major disciplines in earth sciences, namely geography, geology, geophysics and geodesy.
地球学又分为四大类, 即地理学, 地质学, 地球物理学和测地学.
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The Very - Long - Baseline Interferometry ( VLBI ) is one of the most powerful techniques for astronomy and geodesy.
甚长基线干涉测量 ( VLBI ) 是天文学和测地学研究中的重要观测技术之一.
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