重新定义欧洲的实质是欧洲边界问题。
The essence of redefining Europe is the issue of European border.
以实质病变为主的疾病8例，磨玻璃密度阴影多为限局性分布，其边界也常常是清楚的。
In 8 cases of parenchymal diseases, the lesion had a lobar or segmental distribution with a relatively well defined margin.
重新定义欧洲的实质是欧洲边界问题。
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