protect from 防御...
protect against 防止...
protect the environment 保护环境
protect one's rights 维护权利
A: How can I stay safe while hiking?
A：徒步旅行时我该如何保持安全？
B: Wearing a helmet protects your head from injury.
B：佩戴头盔可以保护你的头部免受伤害。
1) 保护，防护
2) 维护，保卫
3) 预防，防御
1. 保护，防护
verb
1. to keep someone or something safe from harm or danger
Synonym: guard, defend, shield