人教版选修8_Unit+3+Inventors+and+inventions+warming+up+and+reading(共25张PPT)
人教版选修8_Unit+3+Inventors+and+inventions+warming+up+and+reading(共25张PPT)第4页

A discovery is __________.

Finding or learning about something (place, fact) that has already existed for the first time.

An invention is __________.

Making or designing something that has not yet existed before.

Discoveries often lead to inventions.

Work out two rules: