A Research on the Functional Test and Sensing Principle for the Ancient Earthquake Direction Detector Invented by Zhang Heng in A. D.是什么意思_A Research on the Functional Test and Sensing Principle for the Ancient Earthquake Direction Detector Invented by Zhang Heng in A. D.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句