击退：通过战斗或斗争来保护自己，避免被伤害或被克服。
抵抗：通过战斗或斗争来抵御（某人或某物），避免被伤害或被克服。
fight off // [ fighting fought fights ]
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
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。
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
She fought off three armed robbers.
她击退了3个持枪抢劫犯。
force or drive back
同义词： repel / repulse / rebuff / drive back
... fight it out一决雌雄，彻底解决 fight off打退；竭力摆脱；排斥 fight on继续战斗(斗争) ...
He felt pleasantly drowsy and had to fight off the urge to sleep.
他感觉舒适地昏昏欲睡，不得不击退睡意。
In this rudimentary natural society men go out to hunt and fish and to fight off the tribe next door while women keep the fire going.
在这个原始的自然社会里，男人出去打猎、捕鱼、击退隔壁部落，而女人则继续生火。
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。
So,they lack the immunity to fight off the disease.
VOA : standard.2009.09.04
He is against singling out a particular citizen or group of people to go off and fight.
他反对特定挑选某个公民,或某个群体去参加战斗。
公正课程节选 : 耶鲁公开课
Some people can fight the brain off in this case, and control their food intake, maintain a healthy diet, and maintain a normal weight, but the number of such people in the population is shrinking by the day.
有些人可以抵制大脑的控制,控制食物的摄入量,维持健康饮食 保持正常体重,而今,这类人的数量日益减少
关于食物的心理学、生物学和政治学课程节选 : 耶鲁公开课
New research has found that mice with cancer are better able to fight off the disease when they are in complex, stimulating environments, with lots of toys and other mice that they interact - and compete - with.
VOA : standard.2010.07.14
Often,he would pass islands with strong enemy forces, cut off their supplies and leave them with no chance to fight.
VOA : special.2009.05.24
It is a vital part of the immune system and helps to fight off infections.
This is necessary for you to finish the game and fight off stronger off stronger enemies.
Atchison, Hefner and Rice all started with crossword puzzles mostly just to fight off boredom.