American politicians have great difficult recognizing that admitting more foreign students can greatly promote the national interest by increasing international understanding.

美国政界人士很难意识到，通过增进国际了解，招收更多的外国学生可以极大地促进国家利益。

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American politicians have great difficulty recognizing that admitting more foreign students can greatly promote the national interest by increasing international understanding.

美国政界人士很难意识到，通过增进国际了解，招收更多的外国学生可以对国家极为有利。

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The students have difficulty in understanding the surveying adjustment theory, and lack of the learning interest.

学生对测量平差理论知识难以理解，缺乏学习兴趣，因而教学效果欠佳。

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