New Words：

indoor [ˈɪndɔːr] adj.（在）室内的；在户内进行的；在室内用的
outdoor [ˈaʊtdɔːr] adj.户外的；野外的；露天的

Sample Sentences：

Badminton is an indoor game.
Did you go to swim in the indoor swimming pool?

Children all like outdoor sports.
Outdoor exercise makes us strong in mind and body.

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