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To let them know related elements of inventions. To know the sentence patterns of introducing their inventions.
熟悉介绍自己发明的词汇与句型，为下面介绍自己的生活小发明作铺垫。
youdao
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To let them know related elements of inventions. To know the sentence patterns of introducing their inventions.
熟悉介绍自己发明的词汇与句型，为下面介绍自己的生活小发明作铺垫。
youdao