- 重点词汇
- 发明
invent; create; devise; originate; father; contrive; imagineer; think up; invention; innovation; discovery; contrivance; brainchild
What did Zhang Heng invent?
What did Zhang Heng invent?
invent; create; devise; originate; father; contrive; imagineer; think up; invention; innovation; discovery; contrivance; brainchild