It is a necessary organizing principle that allows people to pool their resources for the common good and mobilize against common threats, whether they are floods or invading armies.

作为一个必要的组织原则，国家使人们可以为了共同利益而集合资源，可以动员起来对付共同威胁—不管是洪水还是侵略者。

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Achievements of the great need to pool a large number of marketing, management, development, human resources services to the common cast.

成就伟业，需要汇集一大批营销、管理、研发、服务人才来共同铸就。

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Standard economic models predict that in the absence of clearly defined property rights, such common resources will be overexploited, with individuals acting without regard for the effects of their actions on the overall pool.

ECONOMIST: Economics focus