VOA慢速英语:Scientists Search for New Clues About Parkinson’s Disease

例句：This is a progressive course in English study.
      这是英语学习的渐进课程。

      It was a progressive disease and he would suffer more and more.
      病情逐渐加剧, 他将忍受越来越大的痛苦。

2.intensity n.强烈, 剧烈

例句：The pain increased in intensity.
      疼痛越来越剧烈。

      I didn't realize the intensity of people's feelings on this issue.
      我没有意识到这一问题能引起群情激奋。

3.idiopathic adj.自发的，先天的

4.unconscious a.失去知觉的,不省人事的;无意识的,不知不觉的

例句：He knelt down beside the unconsicious girl.
      他跪在那个失去知觉的女孩身边。

      We all indulge in unconscious role-playing.
      我们大家都无意识地沉耽于角色扮演之中。

5.stimulation n.刺激；激发；启发；促进

例句：electrical stimulation of nervous tissue
      对神经组织的电刺激

      The playgroup provides plenty of stimulation for the children.
      幼儿游戏组给孩子很多启发。