在行业直接环境方面：目前行业处于成长期向成熟期的过渡阶段，存在进入障碍，基本无退出障碍。

For the competitive environment of the industry, it's growing up towards maturity period, there are some entry barriers, almost without exit barriers.

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艾肯·格林得出结论说，这种退出上的“程序”障碍使欧元不可逆转。

And Eichengreen concluded that this "procedural" obstacle to exit made the euro irreversible.

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多媒体的出现为传统图书退出历史舞台扫清了障碍。

The appearing of multimedia removes the obstruction for the quitting of paper-made books.

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