其影响是复杂的，受社会经济因素、卫生服务、情感支持等多个生理机制的影响。

The effects are complex, affected by socio-economic factors, health-service provision, emotional support and other more physiological mechanisms.

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意志力是卡梅伦先生和公共卫生所关注的缺失因素。

Strength of will is the missing ingredient where Mr. Cameron and public health are concerned.

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不幸的是，导致这些疾病的所有主要风险因素均超出卫生官员的直接控制。

Unfortunately, all the main risk factors that contribute to these diseases fall outside the direct control of health officials.

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