第四部分从理念形象、视觉形象、行为形象三方面进行长春城市旅游形象设计。
The fourth part carries out Changchun city tourism image positioning from mind identity, visual identity and behavior identity.
语用失误的原因较多，作者从话语语用结构，说话规则，礼貌原则和间接言语行为四方面解释受试者的语用失误，并进一步分析被动输入在解决这类失误方面的局限性。
The author tries to explain the limitation of passive input and the four reasons of pragmatic failures: pragmatic structure of discourse, speech rules, politeness strategy and indirect speech act.
接着在理论研究基础上把感知利得与感知风险一并纳入研究框架，从感知风险构面、感知风险影响因素及减少风险行为三个方面进行研究。
The influence factors of the perceived risk, the composing of the consumer perceived risk and the reducing risk behavior are analyzed after theory analyzing.
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