It goes without saying that work without rest will do harm to health.

不需说，工作而不休息会对健康有害的。

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A spokesman for the health Protection Agency said there was "no hard evidence at present" of harm to health.

英国健康保护署(Health Protection Agency)的发言人称“当前还没有强有力的证据”证明对健康有害。

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It does harm to one's mental health.

它会损害人的精神健康。

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Ministers have ordered an independent review, due to report next summer, into the relationship between pricing and promotion of alcohol and the harm to health.

BBC: Ministers are concerned about cheap alcohol

Martin Dockrell, director of research and policy at the campaign group Action on Smoking and Health (Ash), acknowledges that there is no clear evidence of a significant harm to health from second-hand outdoor tobacco smoke.

BBC: New York's outdoor smoking ban: Will the world follow?

The official said there was a possibility of harm to human health.

BBC: Car park at Bellwood closed due to asbestos fears