The characteristics of the focal precursors, field precursors before moderately strong earthquakes and remote precursors before strong earthquakes and their physical essence是什么意思_The characteristics of the focal precursors, field precursors before moderately strong earthquakes and remote precursors before strong earthquakes and their physical essence在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句