In general, a long-time wearing a mask with high breathing resistance harms health, which is thus not recommended.

一般来讲，长时间佩戴高呼吸阻力的口罩可能对身体健康产生不利影响，所以不建议消费者长时间、超等级佩戴防护型口罩。

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The level of oxygen is very high in water, and you will not have any breathing problems.

水中的含氧量很高，所以你不会有任何呼吸方面的问题。

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Those things that happen when you are stressed, such as increased heart rate, fast breathing, and high blood pressure, all decrease as you breathe deeply to relax.

那些当你感到有压力时出现的情况，例如：心跳加速、呼吸急促、血压高——全都会在深呼吸放松的时候降低。

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While these first symptoms may appear to subside, a high fever, breathing problems, and shock can follow, MayoClinic.com said.

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Shanghai is also on guard against bird flu in the real world: Signs in apartment compounds warn residents to watch out for the high fevers, breathing difficulties and other symptoms of the virus.

NPR: China's Bird Flu Response Shows New Openness

It said working on or near damaged asbestos-containing materials, or breathing in high levels of asbestos fibres, could increase the chance of contracting an asbestos-related disease.

BBC: St Austell brewery fined over pub asbestos