It's all dictated by the level of background noise in their listening environment.
这些设置都取决于他们收听环境中的背景噪音水平。
Chapter one is the analysis of ecological environment and historical background.
第一章为生态环境与历史背景分析。
The research of collaborative commerce is of great significance under such a background environment.
在这样的背景下，协同商务的研究具有重要意义。
The research of collaborative commerce is of great significance under such a background environment.
在这样的背景下，协同商务的研究具有重要意义。
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