His coordination is already equal to a human five year old.

他的身体协调能力已经和一个5岁的人类小孩相当。

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This would require international coordination whereby rich countries would issue work permits, obliging the migrants to spend one of, say, each five years working in their own country.

这需要国际间的合作，比如富裕国家发行劳动准入证，让这些移民每一个五年期间有一年在其本国工作。

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Its cost of maintaining includes five aspects: cost of policy coordination, financial cost, administration cost, holding cost and social transaction cost.

它的维持成本包括政策协调成本、财政成本、管理成本、储备成本和社会交易成本五个方面。

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