on occasion

• That robberies take place in malls on occasion , do they not
  有些时候抢劫案也发生在大商场中，对么？
• I like playing tennis on occasion . . .
  有时候我喜欢打网球
• I like playing tennis on occasion
  有时候我喜欢打网球
• By this time , mr . lorry dared to be pleasant with her , on occasion
  这时罗瑞先生已经敢于偶然跟她开开玩笑了
• When i ' m asked about this on occasion , i hedge the question too
  偶尔有人向我提这个问题时，我也避免直接回答。
• On occasion , he breathes
  有时候，他会休息一下。
• On occasion , incidents or events may trigger negative media attention
  有时候，意外或事件会引发媒体负面的注意。
• However , even a healthy pet can have a warm , dry nose on occasion
  然而，有时候一只健康的宠物的鼻子会温热干燥。
• He comes over on occasion
  他有时到我家拜访
• Her predecessor , ricardo lagos , was known on occasion to take the subway to work
  而她的前任拉戈斯据说有时甚至会乘坐地铁上班。