China's Zhang Heng invented the seismograph during the Han Dynasty.中国的张衡在汉朝时发明了地动仪....

seismograph的复数形式为：seismographs...

n.地震仪，测震仪...

seismograph的音标：seismograph的英式发音音标为：['saɪzməgrɑ:f]seismograph的美式发音音标为：['saɪzməgræf]...