环球慢速英语 蝙蝠(4)（在线收听）

Voice 2: Over four million people die from strokes each year. The most common kind of stroke is an ischemic stroke. An ischemic stroke can happen when something blocks one of the blood tubes leading to the brain. These tubes, or arteries, carry blood and oxygen to the brain. So a blocked artery prevents oxygen reaching the brain. A 'stroke' is when some of cells in the brain die as a result of the blocked artery.

声音2：每年有超过400万人因中风死亡。最常见的中风是缺血性中风。通往大脑的血管被堵住就会引起缺血性中风。这些血管，或者说这些动脉为大脑运送血液和氧气。所以，动脉堵塞会导致氧气无法抵达大脑。当大脑的一些细胞因为动脉堵塞而死亡时，就会引发中风。

Voice 1: Melissa Welch worked in a store after school. One day, she felt sick. It seemed like the room was going round and round. Another worker found Melissa at the back of the store. Melissa was unable to speak. She could not stand up. A blocked artery was starving her brain of oxygen. Melissa was experiencing the beginnings of a stroke.

声音1：梅丽莎·韦尔奇放学以后在一家商店工作。有一天，她感觉到很不舒服。房间好像一直在转圈。另外一名工作人员在商店后面发现了梅丽莎。当时梅丽莎无法说话。她也不能站起来。动脉阻塞导致她大脑缺氧。梅丽莎当时处于中风的初始阶段。