䳃——美国社会问题严重，保障公民经济和社会权利困难重重。

The lingering problems in U. s. society posed challenges for the country to fulfill its duty of safeguarding the economic and social rights of U. s. citizens.

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为了解决经济和社会权利实施所面临的困难和挑战，经济、社会和文化权利委员会提出了“最低核心义务”的概念。

Committee of economic, social and Cultural rights raised the concept of "minimal core obligation" in order to solve the difficulties and challenges from carrying out economic and social rights.

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为了解决经济和社会权利实施所面临的困难和挑战，经济、社会和文化权利委员会提出了“最低核心义务”的概念。

The article summarizes stage partition of overseas risk exploration process: the stage of implementing minimum obligation work amount and the stage of implementing alternative work amount.

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