fight off

抵抗感染

to prevent or defeat an invasion by pathogenic microorganisms

防止或击败病原微生物的入侵

抵抗疾病

to resist a physical or mental disease or sickness

抵抗身体或精神上的疾病

击退竞争

to take action to stay ahead of rival companies or individuals

采取行动以保持在竞争公司或个人之前的领先地位

to successfully resist an attempt to take your position or defeat you

to try hard not to feel tired

to use the body's defenses to destroy harmful bacteria