Take a deep breath in and breathe out, once again. Now imagine that the tension in your entire body melts away and you are flowing softly in the stream of serenity.

深深地吸一口气，再吐出来，再吸，再吐，想象你身体里所有的紧张都随风而逝，你正轻飘飘地在溪流中前进；继续深呼吸，吸气，呼气，再吸气，再呼气，闭上你的眼睛，想象自己正站在世界最雄伟的瀑布高处，任汹涌的水流带走你全部的紧张和不耐烦，取而代之的是安宁、冷静和耐心。

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Take a deep breath, count to ten, and then breathe out.

深吸一口气，在心里数到十，然后呼气。

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Hold your breath for a count of five, then slowly breathe out.

屏住气息数五下，然后慢慢地呼气。

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But soon after, I developed a novel mathematical model which can be used by doctors and environmental specialists to quantify the effect of the pollutants on the lung function as measured by the peak expiratory flow rate-- which is essentially how much a person can breathe out in one breath.

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