marked by recurring high fever and transmitted by the bite of infected lice or ticks; characterized by episodes of high fever and chills and headache and muscle pain and nausea that recur every week or ten days for several months
双语例句
Now he is in the hospital because he has contracted a relapsing fever. 他不幸患上回归热，现在在住院呢。
Relapsing fever is an acute febrile illness caused by spirochetes of the genus Borrelia. 回归热是一种螺旋体属引起的急性发热性疾病。
