protection from sth 既可表示“保护…免受sth的伤害”，也可表示“来自sth的保护”，视具体语境而定：
1.表示“保护…免受sth的伤害”
The walls afforded some protection from the wind. 这些墙壁可以挡一挡风。
Wearing a hat offers some protection from the sun. 戴帽子可以遮挡部分日晒。
The countryside needs greater protection from polluters. 农村地区需要进一步防止污染源。
The dark pigmentation gives protection from the sun’s rays. 深色色素保护皮肤免受阳光伤害。
Your arms and legs need protection from light bouncing off glass. 你的双臂和双腿需要保护，免受玻璃反射光的照射。
He needed protection from steel splinters thrown off by the machine. 他需要防护设备对付从机器甩出来的碎钢片。
用于此义时也可用against，即用the protection against：
He wore a thick overcoat as a protection against the bitter cold. 他穿着厚实的大衣以抵御严寒。
2.表示“来自sth的保护”：
To expect automatic protection from the police is impractical. 期望警方主动提供庇护是不现实的。
Passing sentence, the judge told Kelly that the public needed protection from him. 宣判时，法官告诉凯利公众需要他的保护。
用于此义时也可用of，即用the protection of：
Ships themselves required the protection of naval and air power. 船只本身需要得到海军和空军的保护。
