tiredness

• It caused by lack of sleepness or tiredness
  这是因为睡眠不足或是过于疲劳造成的。
• Summary of researches on teachers ' occupational tiredness
  教师职业倦怠问题研究综述
• However , too much travel causes tiredness
  然而，过多的旅游会使人感到疲劳。
• Tiredness after work is perfectly normal
  工作之后感到疲劳是很正常的。
• Symptoms are unusual paleness and tiredness
  症状是异常的苍白和疲劳。
• Stress and tiredness often result in a lack of concentration
  紧张和疲劳常使人精神不集中。
• Suited community : people who suffer tiredness
  适合人群:感觉疲劳的人
• Stress and tiredness often result in a lack of concentration
  紧张和疲劳常导致人精神不集中
• Bad circulation can cause tiredness
  血液循环不良会引起人体疲劳。
• On college students ' tiredness of study
  大学生厌学现象分析与对策