prophylactic measures 预防措施
prophylactic treatment 预防性治疗
prophylactic device 预防装置
A: What is the purpose of this medication?
A：这种药物的作用是什么？
B: It is a prophylactic measure to prevent infection.
B：它是一种预防感染的预防措施。
1) 预防性的
2) 保护性的
3) 预防措施
1. 预防性的
adjective
1. Designed to prevent disease or harm.
noun
1. A measure or treatment used to prevent disease.
Synonym: preventive