Power reflects unequal relationship between subjects and between resources and is backed up by immediate compulsory force.

权力体现主体之间和资源之间不对等的关系，以直接强制性为后盾。

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The service is compulsory and free in the conventional power systems.

在传统的电力系统体制中，这种服务一般是义务和免费的。

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The properties of compulsory strength, expansionism, benefit, implement determine that power must be effectively supervised and restricted.

权力的强制性、扩张性、利益性、工具性等特点决定了权力必须受到有效的监督和制约。

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New public-private urban regeneration companies, which have planning and compulsory purchase power, similar to ones already introduced in Sheffield, Liverpool and Manchester, are also likely to be backed in new areas such as Leicester.

ECONOMIST: The pre-budget report

The council does have the power to compulsory purchase an empty home "in exceptional circumstances" but as yet this has not happened.

BBC: Cornwall Council tackles empty homes crisis

The union said the only disappointment was that the assembly still did not have the power to make seat belts compulsory.

BBC: New code for school bus behaviour