bolt

• 副词，表示“笔直地、直立地”，最常见于 bolt upright（笔直地、挺直地）。也可表示“突然地、猛地”，如 bolt from the blue（晴天霹雳）。其形式与名词和动词相同。

An adverb meaning 'in a rigid, straight, or upright position,' most commonly used in the phrase 'bolt upright.' It can also mean 'suddenly' or 'directly,' as in 'bolt from the blue.' The form is identical to the noun and verb.

1. Suddenly and quicklyB2informal

   Used to describe a sudden, swift movement, often in the phrase 'bolt upright'.

   突然而迅速地

   • He sat bolt upright when he heard the noise.
   • She woke up bolt upright from a nightmare.
   • The cat shot bolt upright at the sound of the dog barking.

   同义词abruptlyquicklyrapidlysharplystraightsuddenlyswiftly

   反义词graduallyslowly

• 名词，指带有螺纹杆和头部的金属紧固件，用于连接物体；也指突然的闪电。

A noun referring to a metal fastener with a threaded shaft and a head, used to hold objects together, or a sudden flash of lightning.

1. FastenerA2formal

   A metal pin or rod used to hold things together, often with a nut.

   螺栓

   • He tightened the bolt with a wrench.
   • The shelf is secured with four bolts.
   • The bolt came loose and the door fell off.

   同义词pinscrewstud

2. B1formal

   A flash of lightning, especially one that appears as a streak.

   闪电

   • A bolt of lightning struck the tree.
   • The storm brought thunder and bolts of lightning.
   • We saw a bright bolt in the sky.

   同义词flashstreakthunderbolt

3. Sudden runB2informal

   A sudden, quick dash or escape.

   猛冲

   • The horse made a bolt for the open gate.
   • He made a bolt for the exit when the fire alarm went off.
   • The cat made a sudden bolt under the sofa.

   同义词bounddartdashescaperushscampersprint

• 多义词：快速逃跑、用螺栓固定某物，或非常快地吃完某物。

A verb with multiple meanings: to run away quickly, to fasten something with a bolt, or to eat something very quickly.

1. Run away quicklyB2informal

   To run away suddenly, often out of fear or to escape.

   逃跑

   • The horse bolted when it heard the loud noise.
   • He bolted from the room after the argument.
   • The thief bolted as soon as he saw the police.

   同义词dartdashescapefleehightail itrun offsprinttake off

   反义词remainstay

2. Fasten with a boltB1formal

   To secure or lock something using a metal bolt.

   用螺栓固定

   • She bolted the door before going to bed.
   • Make sure to bolt the gate so it doesn't swing open.
   • He bolted the cabinet shut to keep it secure.

   同义词barclampfastenlatchlocksecure

   反义词loosenunboltunfastenunlock

3. Eat quicklyB2informal

   To eat food very quickly without chewing properly.

   狼吞虎咽

   • He bolted down his breakfast before rushing to work.
   • She bolted her lunch in just five minutes.
   • Don't bolt your food; it's bad for digestion.

   同义词devourgobblegulpscarfstuffwolf

短语动词变体bolt downbolt out