人教版选修8:Unit 3 Inventors and inventions reading and some languange points(共51张PPT)
人教版选修8:Unit 3 Inventors and inventions reading and some languange points(共51张PPT)第2页

A discovery is __________. finding or learning about something (place, fact) that has already existed. An invention is __________. making or designing something that did not exist before.

Discoveries often lead to inventions.

Connection between discovery and invention

something found out but it was unknown before

something created by human beings.