1. His research on Europeanism focuses on the political and economic integration of European countries.
他的研究集中于欧洲国家的政治和经济一体化。

2. The rise of nationalism has challenged the ideals of Europeanism and the concept of a unified Europe.
民族主义的兴起对欧洲主义的理念和统一欧洲的概念构成了挑战。