如题所述
第1个回答 推荐于2017-09-26
简单的划分,from后面加对于人的伤害；
against后面加对于物的伤害。
参考：
The eternal question:Which is the right preposition?Yes,there is a difference,but a subtle one.There is a tendency to regard "protect against" as being less absolute than "protect from." Thus you "protect against rust," because absolute rust-proofing is not always possible.You "protect from harm," which is probably equally chancy,but when saying it you wish to suggest the comfort and confidence of absolute protection.But this tendency is not absolute.To protect from mildew and protect against mildew will normally be regarded as the same thing,although in this case I prefer "against." If you are going to protect a child who is being bullied or threatened,you will more likely choose "protect from," but I hesitate to generalize off the top of my head that "against" is used with things and "from" with people.Others may very well have better ideas about this than I.本回答被提问者和网友采纳
against后面加对于物的伤害。
参考：
The eternal question:Which is the right preposition?Yes,there is a difference,but a subtle one.There is a tendency to regard "protect against" as being less absolute than "protect from." Thus you "protect against rust," because absolute rust-proofing is not always possible.You "protect from harm," which is probably equally chancy,but when saying it you wish to suggest the comfort and confidence of absolute protection.But this tendency is not absolute.To protect from mildew and protect against mildew will normally be regarded as the same thing,although in this case I prefer "against." If you are going to protect a child who is being bullied or threatened,you will more likely choose "protect from," but I hesitate to generalize off the top of my head that "against" is used with things and "from" with people.Others may very well have better ideas about this than I.本回答被提问者和网友采纳
第2个回答 2010-01-31
例句
1，He is always protecting against others.他总是防范着别人~
2，He is always protecting him from danger.他总是保护着自己免受侵害~
短语
protect against 直接加名词~意为“防范。。。”
protect from 一般用作protect A from B~意为“使A免受B的侵害”
1，He is always protecting against others.他总是防范着别人~
2，He is always protecting him from danger.他总是保护着自己免受侵害~
短语
protect against 直接加名词~意为“防范。。。”
protect from 一般用作protect A from B~意为“使A免受B的侵害”
