New from Scientific American 太空微重力狀態會讓心臟變圓!英文聽力鍛鍊最佳素材在這裡。
下載聲音檔請點我 下載填空卷請點我 下載解析版請點我 教練現在每周上傳兩篇英文聽力練習, 短篇聽力就是 科學人Scientific American, 長篇的則是 NPR。 記得英文聽力要下載講義, 然後反覆聽,聽到爛熟效果最好 。 Absence (of Weight) Makes the Heart Grow Rounder After prolonged periods in microgravity, astronauts' hearts became more spherical, according to scans done on the International Space Station. Sophie Bushwick reports When astronauts float weightless in space , their muscles don't need to work as hard as on Earth . Muscles, therefore, atrophy 萎縮 during a long mission , which can cause trouble when space travelers return home. But what happens to that most vital 最重要的 of muscles, the heart? To find out, 12 astronauts learned how to do ultrasound scans 做超音波掃描 of their hearts. Then they recorded the organ's shape before, during and after a stint 任務 on the International Space Station 國際太空站 . The scans showed that while in microgravity 微重力 the astronauts' hearts deformed 變形 into more spherical shapes. Back on Earth, th