bout  
noun [ C ] uk/baʊt/ us/baʊt/
  (SHORT PERIOD)      
  (疾病的)发作;(某活动的)一段,一阵,一场
a short period of illness or involvement in an activity
 UK a bout of flu  一场流感 
US a bout with the flu  一场流感 
 He suffered from periodic bouts of insanity. 他得过阵发性精神错乱。 
 a drinking bout (= short period of drinking a lot of alcohol) 一场狂饮 
   (SPORT)      
 拳击比赛;摔跤比赛
a boxing or wrestling match
  He's a former heavyweight champion and is expected to win the bout easily. 他是前重量级冠军,估计会轻松拿下这场比赛。