Defining this model is the necessary intermediary step between the concept stage and implementation stage.

对模型进行定义是概念阶段和实现阶段之间的必要中间步骤。

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The construction of Sino-ASEN Free Trade Zone has already entered the implementation stage, facing many legal matters.

中国-东盟自由贸易区的建设已进入了实施阶段，面临诸多法律问题。

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As both sides are moving forward in the implementation stage, there may still be some backpedaling or reneging on the deal.

尽管双方已进到实施阶段，但也许仍会有一些变卦或违约情况。

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Mr. ABDEL-SHAFI: I think doubt is winning so far because we need to see what the implementation stage will bring.

NPR: New Gaza Agreement Met with Cautious Optimism

Sales are still sluggish in Germany, France and Italy, but publishers hope that things will improve once Europe's single currency moves from the preparation into the implementation stage.

ECONOMIST: G?tterd?mmerung postponed

After implementation stage, usually Palestinians, especially those in the West Bank and Gaza, came to realize many of the realities, and they were disappointed so many times so frequently that we've learned the hard way to wait until any negotiated solution or agreement is actually implemented before we start to be very optimistic about it.

NPR: New Gaza Agreement Met with Cautious Optimism