Work in groups. Prepare for your discussion.
小组合作，为你的讨论做准备。
. Think of an invention that has changed your life.
想出一项改变了你的生活的发明。
. Make notes about the invention:
做有关这项发明的记录：
1. What is it?
它是什么？
2. Why is it useful?
它为什么是有用的？
. Research how the invention has been developed and make notes about what you find out.
调查这项发明是如何发展的，并记录调查结果。
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