Two major reasons contribute to this change of attitude, namely, altered perceptions of the destination, and the increased difficulties of doing business.
原因主要有两点：目的地感知的改变和经营困难的增多。
However, upgraded competition among media operators, noisy communication environment, increased difficulties of effect evaluation and so on as side effects are coming with the flourish.
然而与之相伴的是媒介经营者的竞争升级，广告传播环境的嘈杂，广告效果评估的难度日增。
However, upgraded competition among media operators, noisy communication environment, increased difficulties of effect evaluation and so on as side effects are coming with the flourish.
然而与之相伴的是媒介经营者的竞争升级，广告传播环境的嘈杂，广告效果评估的难度日增。
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