参考翻译

In the exhibition hall of the Museum of Chinese History in Beijing,there is a restored model of the first seismograph.The inventor was Zhang Heng,a famous scientist in the Eastern Han Dynasty.In 132 A.D,in the then national capital Luoyang,Zhang Heng made the ancient seismograph to identify the direction of an earthquake.It was made of fine copper,and looked like a big cup with a lid.The instrument was cast with eight dragons on the surface,and each dragon held a copper ball in the mouth.On the ground below the dragons,there were eight copper toads raising their heads and opening their mouths opposite the dragons'mouths.People highly respect Zhang Heng as a great scientist,and they often hold commemorative activities to show respect for him.A crater on the moon was named after him.

来源:可可英语 http://www.kekenet.com/menu/201504/369580.shtml