fight off (fighting,fought,fights)

• 1.  

  PHRASAL VERB（动词词组） If you fight off something, for example, an illness or an unpleasant feeling, you succeed in getting rid of it and in not letting it overcome you. 摆脱; 抵抗

  例：

  Unfortunately these drugs are quite toxic and hinder the body's ability to fight off infection.

  不幸的是，这些药毒性很大，妨碍身体抗感染的能力。

• 2.  

  PHRASAL VERB（动词词组） If you fight off someone who has attacked you, you fight with them, and succeed in making them go away or stop attacking you. 击退

  例：

  She fought off three armed robbers.

  她击退了3个持枪抢劫犯。