How these behavioural changes come about was, until recently, obscure.

这些行为改变是如何产生的至今仍让人费解。

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This awareness has been accompanied by behavioural changes that are expected to reduce opportunities for human infections to occur.

这种认识已伴随发生行为改变，预期会减少人类感染发生的机会。

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Warnings that include images of the harm that tobacco causes are particularly effective at communicating risk and motivating behavioural changes, such as quitting or reducing tobacco consumption.

包含图象说明烟草所造成危害的警示可尤其有效地宣传烟草的危害并推动行为变化，例如戒烟或减少烟草消费。

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We must promote greater health literacy and behavioural changes that will reduce non-communicable diseases and tobacco and alcohol abuse.

UN: Secretary-General

It continues to promote access to comprehensive and reliable youth-friendly information in quest of behavioural changes with the special emphasis on disadvantaged young people.

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Some reports have suggested that certain food additives can cause behavioural changes in some children, although many experts agree it is difficult to come to firm conclusions from the research carried out so far.

BBC: NEWS | Health | Additives lurk in everyday diets