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boltnoun [ C ]uk/bəʊlt/ us/boʊlt/

bolt noun [ C ] LOCK

a metal bar on a door or window that slides across to lock it closed（门窗上的）插销，闩

I closed the window and drew the bolt (= slid the bolt across).我关上窗户，拉上了插销。

bolt noun [ C ] SCREW

a screw-like metal object without a point, used with a nut to fasten things together螺栓

bolt noun [ C ] LIGHTNING

a flash of lightning that looks like a white line against the sky闪电，霹雳

The house next to ours was struck by a bolt of lightning.我们隔壁的房子被闪电击中了。
See also
thunderbolt (THUNDER)

bolt noun [ C ] ROLL

a length or roll of cloth or wallpaper（布或墙纸的）一匹，一卷

bolt noun [ C ] WEAPON

a type of short arrow shot from a crossbow (= a type of weapon)弩箭；方镞箭

bolt noun [ C ] QUICK MOVEMENT

make a bolt for somewhere

to try to escape by running towards something逃向…

The thief tried to make a bolt for the exit.小偷想从出口溜走。

Idiom(s)

a bolt from/out of the blue
boltverbuk/bəʊlt/ us/boʊlt/

bolt verb MOVE QUICKLY

[ I ] to move very fast, especially as a result of being frightened（尤指因受到惊吓而）奔跑，快跑

Frightened by the car horn, the horse bolted.那匹马受到汽车嗽叭的惊吓，飞奔了起来。

bolt verb EAT

[ T ] also bolt down to eat food very quickly匆匆咽下；囫囵吞下

Don't bolt your food like that - you'll get indigestion.别那样狼吞虎咽——会消化不良的。

bolt verb LOCK

[ I or T ] to lock a door or window by sliding a bolt across闩上（门或窗）

Have you locked and bolted the door?你把门锁闩好了吗？
The door bolts on the inside.门从里面闩上。

bolt verb SCREW

[ T usually + adv/prep ] to fasten something in position with a bolt用螺栓固定

On a ship the furniture is often bolted to the deck.轮船上的家具往往用螺栓固定在甲板上。

Phrasal verb(s)

bolt sth on

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