城市游憩商业区作为城市游憩系统的重要组成部分，成为现在研究的热点问题。
As an important part of urban recreation system, urban RND became a popular word nowadays.
城市游憩商业区作为城市游憩系统的重要组成部分，成为了现在研究的热点问题。
As an important part of urban recreation system, urban RBD becomes a popular subjects nowadays.
城市游憩商业区作为城市游憩系统的重要组成部分，成为了现在研究的热点问题。
As an important part of urban recreation system, urban RBD becomes a popular subjects nowadays.
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