protect
单词辨析：
普通用词，指采取手段使某人不生病或某物不受损害等。
Physical exercise can protect you against the flu.
体育锻炼可以预防流感。
What shall I do to protect my car against rust?
怎样才能防止汽车生锈？
She closed the window to protect the books from the rain.
她关上窗户防止雨水把书淋湿。
通常指用武装力量保护，使某人、某物、某处免受袭击。
The Great Wall was once used to defend against military aggression.
长城曾用来防御军事侵略。
He was sent to defend the border three years ago.
3年前他被派去守卫边疆。
指警惕地守护以防止造成伤害、损失等。
The command told those two soldiers to guard the entrance.
指挥官叫那两名士兵守着入口。
A lioness guarded her cubs.
一头母狮守护着幼狮。
通常指保护人、企业等免受伤害或损失。
import tariffs that shield enterprises from foreign competition
保护企业免受外国竞争威胁的进口关税
His wife lied to shield him when she took the stand.
他的妻子在出庭作证的时候为保护他而撒了谎。
She drew the curtains, shielding her eyes from the sun.
她拉上窗帘，使眼睛免受阳光照射。
相关例句：
Society is entitled and bound to protect itself against a cult of violence
社会有权力和义务保护自身不受暴力行为的侵害。
I feel that not enough is being done to protect the local animal life
我觉得对当地野生动物的保护力度不够。
There are circumstances in which the State must step in to protect children.
有些情况下，国家必须出面保护儿童。
Exercise will not only lower blood pressure but possibly protect against heart attacks
锻炼不仅会降低血压，而且可能对心脏病有预防效果。
Laws protect the enjoyment of their rights.
法律保障他们享受自己的权利。
They sent naval forces to protect merchant shipping.
他们派出了海军保护商船。