This paper, with the audience theory as its theoretical guide and by taking a case study on Bilingual traffic Public Signs in Xi'an, especially on bilingual station names of Xi'an Metro Line 2, first briefly discusses how an important role city traffic public signs play in serving the audience, facilitating tourism as well as disseminating Chinese culture through the international audience. Second, it analyzes the problems existing in the present bilingual public signs in China and the counter-productive effects they are likely to bring about. And finally proposal for a new system of bilingual station names of Xi'an Metro Line 2 is put forward, which, the author believes, will not only offer the exact information wanted but make the audience abroad feel at home.

In recent years, ecological teaching of college English has become a research focus. This research mainly discusses the ecological teaching mode of college English based on the computer network environment. The college English classroom teaching and the network autonomous learning classroom under the computer network environment of the university public foreign language teaching and research department are selected as the objective test environment, and the qualitative and quantitative integration are combined to summarize the imbalanced performance in the integration. From a micro point of view, deeply explore the constraints that affect the successful construction of an ecological teaching model in a computer network environment, focus on investigating the “student anxiety” in the network teaching environment, sort out the original text data obtained from the experiment, and conduct scientific statistics on the effective data, quantitative analysis, find out the cause of anxiety, thus complete the experimental design and data collection. On average, 55.6% of students have an anxiety tendency when they study online, and even 35.9% of students have serious anxiety and frustration. This research has guiding significance for the ecological teaching of college English.

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