bolt

noun

/bəʊlt/

Idioms

enlarge image
a long, narrow piece of metal that you slide across the inside of a door or window in order to lock it（门窗的）闩，插销
- He slid back the bolt on the door.他拉开了门上的插销。
Collocations Dictionary
verb + bolt
- draw back
- pull back
- slide back
- …
a piece of metal like a thick nail without a point which is used with a circle of metal (= a nut) to fasten things together螺栓
- nuts and bolts螺帽和螺栓
Topics Engineeringc2
Collocations Dictionary
verb + bolt
- tighten
- tighten up
- loosen
- …
phrases
- nuts and bolts
bolt of lightning a sudden flash of lightning in the sky, appearing as a line闪电Topics Weatherc2
a short heavy arrow shot from a crossbow弩箭

a long piece of cloth wound in a roll around a piece of cardboard一匹（布）

词源noun senses 1 to 4 Old English, ‘arrow’, of unknown origin; related to Dutch bout and German Bolzen ‘arrow, bolt for a door’. noun sense 5 Middle English: transferred use of bolt ‘metal pin’.

Idioms

a bolt from the blue

an event or a piece of news which is sudden and unexpected; a complete surprise突如其来的事件（或消息）；晴天霹雳
- Her dismissal came as a bolt from the blue.她被解雇简直就是晴天霹雳。

have shot your bolt

(informal) to have used all your power, money or supplies竭尽全力；倾其所有

make a bolt for something | make a bolt for it

to run away very fast, in order to escape迅速逃跑；溜走
- The pony suddenly made a bolt for freedom.小马突然奔向自由。

the nuts and bolts (of something)

(informal) the basic practical details of a subject or an activity基本要点
- The documentary focuses on the real nuts and bolts of the film-making process.这个纪录片关注的是电影拍摄过程中的具体细节。

bolt

verb

/bəʊlt/

动词形式

present simple I / you / we / they bolt	/bəʊlt/ /bəʊlt/
he / she / it bolts	/bəʊlts/ /bəʊlts/
past simple bolted	/ˈbəʊltɪd/ /ˈbəʊltɪd/
past participle bolted	/ˈbəʊltɪd/ /ˈbəʊltɪd/
-ing form bolting	/ˈbəʊltɪŋ/ /ˈbəʊltɪŋ/

Idioms

[transitive, intransitive] bolt (something) to fasten something such as a door or window by sliding a bolt across; to be able to be fastened in this way用插销闩上；能被闩上
- Don't forget to bolt the door.别忘了闩门。
- The gate bolts on the inside.大门在里面上闩。
- Make sure that the rails are securely bolted in place.务必确保栏杆都固定住了。
Collocations Dictionary
adverb
- firmly
- securely
- together
- …
preposition
- to
[transitive] to fasten things together with a bolt用螺栓把（甲和乙）固定在一起
- bolt A to B The vice is bolted to the workbench.这虎钳是用螺栓固定在工作台上的。
- bolt A and B together The various parts of the car are then bolted together.然后汽车的各种部件便用螺栓装配在一起。
- The two parts are bolted together.这两部份用螺栓固定在一起。
- The yacht's keel is bolted to the hull.游艇的龙骨用螺栓固定在船身上。
Topics Engineeringc2
Collocations Dictionary
adverb
- firmly
- securely
- together
- …
preposition
- to
[intransitive] if an animal, especially a horse, bolts, it suddenly runs away because it is frightened（马等受惊）脱缰
- Bonnie the mare broke free and bolted.母马邦妮挣脱了，跑了。
- The plane swooped down low and the horses bolted.飞机俯冲至低空，那些马受惊脱缰而去。
[intransitive] (+ adv./prep.) (of a person人) to run away, especially in order to escape跑开；（尤指）逃跑
- When he saw the police arrive, he bolted down an alley.他看见警察来了，便从小巷逃走了。
- For a moment I thought about bolting, but there was no escape.有一刻我想要逃跑，但无路可逃。
- She bolted through the open door.她从敞开的门跑了出去。
- They turned and bolted off down the stairs.他们转身跑下楼梯。
[transitive] bolt something (down) to eat something very quickly狼吞虎咽
- Don't bolt your food!吃饭不能狼吞虎咽！
(North American English) [transitive, intransitive] bolt (something) to stop supporting a particular group or political party停止支持（某团体或政党）
- Many Democrats bolted the party to vote Republican.很多民主党人放弃本党，转而投共和党的票。
[intransitive] (of a plant, especially a vegetable植物，尤指蔬菜) to grow too quickly and start producing seeds and so become less good to eat过早结实（因而食用价值降低）

词源verb senses 1 to 2 Old English, ‘arrow’, of unknown origin; related to Dutch bout and German Bolzen ‘arrow, bolt for a door’. verb senses 3 to 7 Middle English: from the other verb senses of bolt, expressing the sense ‘fly like an arrow’.

Idioms

close, lock, etc. the stable door after the horse has bolted (British English)

(North American English close, lock, etc. the barn door after the horse has escaped)

to try to prevent or avoid loss or damage when it is already too late to do so马跑了才去关厩门；贼走关门，为时已晚

bolt

adverb

/bəʊlt/

Idioms

sit/stand bolt upright

to sit or stand with your back straight背部笔挺地坐／站；坐／站得笔直Topics Appearancec2

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