冥想从改变人体的工作开始：心跳减慢，泵出更少的血液；肌肉放松。

Meditation starts by changing how the body works: the heart slows, pumping less blood; the muscles relax.

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这是因为烟立刻就能深入血液，改变其化学成分变得更加浓稠，形成血块堵住已经很窄的动脉。

This is because smoke immediately seeps into the bloodstream and changes its chemistry so that it becomes more sticky, allowing clots to form that can squeeze shut already narrowed arteries.

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今年即2005年世界献血日主题为“庆祝你的血液礼物”，并将突出其生活因血液而发生改变—在许多情况下其生命得到拯救的人们的真实故事。

This year, World blood Donor Day 2005 will have the theme "Celebrating your gift of blood" and will highlight true stories of people whose lives have been changed - in many cases saved - by blood.

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