Check and operate the air conditioning system.

检查并运行一下空调。

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With the change of environment and indoor heat load, the refrigeration and air-conditioning system almost operate at varying condition.

随着环境和室内热负荷的变化，制冷空调系统通常是在变工况条件下运行。

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The hospital can operate only "on a first-aid basis, " as the staff works without air conditioning or lights to care for about 250 patients, she said.

CNN: Mayhem hampering hospital evacuations