免受的英文：
be safe against ;be safe from ;insure against

参考例句：

A helmet guards your head against/from injuries.
头盔可以保护你的头部免受伤害。

Having a new baby to look after has clipped her wings a bit.
她有个新生婴儿要照看,活动难免受些限制.

Spiders may rely on camouflage to protect them from predators such as birds.
蜘蛛能依靠伪装保护自己免受如鸟一类的掠食者的威胁。

Salvation from Hellfire
(2)免受地狱火之苦

Ensure sB. against[from] danger
保护某人免受危险

May God protect you from harm.
愿上帝保佑你免受伤害。

The soldiers secured the camp against attack.
士兵保卫营房免受攻击。

They guarded him from harm.
他们保护他免受伤害。

You should indemnify yourself from loss.
你应该使自己免受损失。

The doctor immunized them against diphtheria.
医生使他们免受白喉的威胁。

safe是什么意思：
adj. 安全的；不致导致损害的；小心的；有确凿证据的；风险小的
n. 保险箱，保险柜

"Safe Bind, safe find"
藏的稳,找的准

Indexing and searching are not only thread safe, but process safe.
建立索引和搜索不是线程级安全的，但是是进程级安全的。

No safe wading in an unknown water
未知水深浅,涉水有危险

against是什么意思：
prep. 与...相反；对...不利；倚靠；以防；以...为背景；和...相比

It is against federal law to discriminate against blacks.
歧视黑人是违反联邦法律的。

She was drugged against the pain.
她服麻醉药止痛。

He informed against the drugpusher.
他告发了那个毒品贩。

insure是什么意思：
v. 确保；投保

The amount of a claim on an insurer by an insured.
险损赔偿额保险人从承保人获得的赔偿数量。

An insurance company will insure your house against fire.
保险公司愿为你的房屋保火险。

I have insured my car with a Japanese insurance company
我已向一家日本保险公司投了我的汽车保险。