?为生活而奔波

... fight for higher wages and better conditions of labour为高薪与更好的工作环境而抗争 fight for one's life为生活而奔波 fight for the liberty and peace为自由与和平而战 ...

?病危

... fight fire with fire 以牙还牙；用同样严厉的手段还击对方 fight for one's life 病危 fight it out 决一雌雄，斗争到底；以斗争(或辩论、谈话)方式解决问题 ...