词汇精选：guard的用法和辨析
一、详细释义：
n.
哨兵；卫兵；警备员；看守员；警卫员 [C]
例句：
The prisoner slipped past the guards on the gate and escaped.
犯人从门卫身旁溜出去逃走了。
例句：
The guard was punished for deserting his post.
卫兵因擅离职守而受到处罚。
护卫队；（英国等的）皇家禁卫军（常大写）
例句：
He spent part of the war in the National Guard.
他在国家护卫队扮演了战争中一份子。
守卫；警戒；看守 [U]
例句：
Another ward in the sanatorium had no guard on it at all.
在医院的另一个病房根本没有保卫监视。
防护装置，防护物 [C]
例句：
Ensure the guard is in place before operating the machine.
一定要在防护装置放到位后再开机器。
【英】（火车的）列车长 [C]
例句：
The guard wave his flag and the train leave the station.
列车长摇动手中的旗子，火车随之开出车站。
例句：
The train robbers coshed the guard.
抢劫列车的匪徒用短棍袭击列车长。
（拳击等的）防御姿势，防守 [U]
例句：
He got in under his opponent's guard.
虽然对手摆出防御姿势，但仍被他击中。
v.
保卫；守卫；警卫 [T]
例句：
The gate is guarded by soldiers; you can't go without a pass.
大门有兵守卫，你没有通行证过不去。
例句：
Troops were detailed to guard the frontiers.
派遣部队去防守边界。
看守；监视 [T]
例句：
The dog was guarding its owner's luggage.
狗守护着主人的行李。
例句：
A detachment of ten men remained behind to guard the prisoners.
由十名士兵组成的分遣队留在后面看守囚犯。
控制；使（言词等）谨慎 [T]
例句：
He is guarded in his answers, but his excuses are groundless. His guilt is obvious.
他谨慎地回答，但其辩解站不住脚，他明显有罪。
防范；警惕(+against) [I]
例句：
The neighboring countries were on guard against the military expansion of that country.
那个国家的军事扩张引起邻国的警惕。
例句：
We should be on guard against the enemy's invasion.
我们要防范敌人的入侵。
二、词义辨析：
defend,protect,safeguard,guard,shield,shelter,harbour
这些动词均有“保护、保卫”之意。defend普通用词，指用武力或其它措施使人或物不受损害，消除危险。用作比喻时，指坚持某种行动、决定或意见。 protect普通用词，指用某种手段作为防御工具以防危险或伤害。safeguard语气强，指采取积极措施预防可能发生的一切攻击或危险。guard普通用词，指保持警惕以防可能的攻击或伤害。shield语气比protect强，但侧重防止迫在眉睫的攻击或伤害。shelter通常指寻找安全地方躲避风雨或使人免遭危害。harbour贬义词，指隐匿或非法保护、窝藏。
三、相关短语：
guard of honor
n.仪队,仪仗队
off guard
下岗,不警惕,未提防
old guard
守旧派,保守分子
on guard
值班,站岗;提防,警惕
on one's guard
adv.警惕
shin guard
n.(足球,冰球等运动员戴的) 护胫
splash guard
n. 挡泥板
stand guard
站岗,放哨,值勤,保卫
watch guard
n.挂表链,表带
guard's van
n.列车员车厢
bumper guard
缓冲保护器
face guard
面具，防护面具
四、参考例句：
You guard our borders.
你们保卫着我们的边境。
Stalwart policemen stood guard outside.
强壮的警察在外面警戒。
The guard deserted his post.
卫兵擅自离开了他的岗位。
Be on your guard, I conjure you.
千万要警惕呀，我恳求你。
Be on your guard against thieves.
要堤防盗贼。
A guard was posted outside the building.
建筑物外设了一名警卫。
He was a guard of gigantic strength.
他是个具有巨人般力气的卫士。
The soldier volunteered for guard duty.
那个战士自告奋勇去站岗。
Be on your guard against pickpockets.
谨防扒手。
Troops were detailed to guard the frontiers.
派遣部队去防守边界。
