以下为句子列表：
英文: Fundamental concept and research contents of tourist environmental bearing capacity were discussed in the paper.
中文: 摘要文章论述了旅游环境承载力的基本概念，研究内容。
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英文: Introduce the fundamental concept of source and channel coding.
中文: 介绍信源信道编码的基本原理。
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