drowsiness [ˈdraʊzɪnɪs]

例句:

• They do, however, suffer from daytime drowsiness.
  来自SA
• Big meals during the day cause drowsiness.
  白天吃太多会让人昏昏欲睡。
  
• A feeling of drowsiness crept over him.
  一种昏昏欲睡的感觉逐渐袭扰着他.
  
• This decision reached , he finally felt a placid drowsiness steal over him.
  想到这, 来了一点平安的睡意.
  
• Turkey allegedly causes drowsiness because it is packed with a nutrient called tryptophan.
  来自SA
• Drugs like Valium produce a state of relaxation and a pleasant drowsiness, which may reduce anxiety and agitation.
  来自BBC