问题描述：
the concept of xx 还是concept of xx
比方说
在做总体的introduction的时候
1 the concept of xx or concept of xx
2 The most popular recreational activities :sports
3My favorite recreational activities :American TV series
比方说
在做总体的introduction的时候
1 the concept of xx or concept of xx
2 The most popular recreational activities :sports
3My favorite recreational activities :American TV series
问题解答：
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