备战这个词怎么用英语表达

备战这个词用英语可以表达为 "be preparing for" 或者 "be in training for"。比如，如果你要表达备战考试，可以说 "I am preparing for the exam" 或者 "I am in training for the exam"。如果是备战比赛，可以说 "We are preparing for the competition" 或者 "We are in training for the competition"。