VOA慢速英语:Study: Head Lice Growing Resistant to Existing Treatments

1. infect vt.使受影响，感染; 传染
例句：One bad boy may infect a whole class.
一个坏学生可能会影响全班。

2. resistant adj.有抵抗力的，抵抗的
例句：A healthy diet creates a body resistant to disease.
保健饮食有助于增强体内对疾病的抵抗力。

3. mutate vt.变异; 突变; 改变
例句：The process by which some microbes differentiate or mutate.
离异，分离变异一些微生物变异或经历突变的过程。

4. shrivel vt.（因热力，严寒、干燥、年老等而）枯萎，皱缩
例句：Leaves shrivel in autumn.
树叶在秋天枯萎。