a large metal pin, in particular
大金属栓，尤指：
a bar that slides into a socket to fasten a door or window
（门、窗的）插销。
a long pin with a head that screws into a nut or is used to fasten things together
螺栓。
the sliding piece of the breech mechanism of a rifle
枪栓。
【登山】 岩石栓。
a short, heavy arrow shot from a crossbow
（用弩弓发射的）弩箭。
a flash of lightning that can be seen shooting across the sky in a jagged white line
闪电，霹雳。
fasten with a bolt, in particular
拴住，扣紧，尤指：
fasten (a door or window) with a bar that slides into a socket
将门（或窗）闩上
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all the doors were locked and bolted .所有的门都已经锁好闩上了。
(with obj. and adverbial of place)fasten (something) to something else with a long pin that screws into a nut
用螺栓固定（某物）。
[no obj.](of a horse or of other animal)run away suddenly out of control
（马或其他动物）突然失控逃跑
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the horses shied and bolted .马受惊挣脱了缰绳。
[no obj., with adverbial of direction](of a person)move or run away suddenly in an attempt to escape
（人）逃跑
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they bolted down the stairs .他们逃下楼梯。
[with obj.](in hunting)cause (a rabbit or fox) to run out of its burrow or hole
逼迫（兔子、狐狸）跑出洞穴。
(of a plant)grow quickly upwards and stop flowering as seeds develop
（植物）迅速成长结籽而不再开花
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the lettuces have bolted .莴苣已经结籽了。
[with obj.]eat or swallow (food) quickly
匆匆吞下（食物）
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it is normal for puppies to bolt down their food .小狗囫囵吞下食物是常事。
a roll of fabric, originally as a measure
（布的）一匹
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the room is stacked with bolts of cloth. 房间里堆满了布匹。
a folded edge of a piece of paper that is trimmed off to allow it to be opened, as on a section of book
（纸等的）卷边。
〈古〉 筛（面粉或其他东西）。
Robert (Oxton) (1924-95), English writer best known for the play
博尔特，罗伯特（·奥 斯腾）（１９２４—１９９５，英国作家，著有戏剧《千秋万代》 ［１９６０］ ，剧本《阿拉伯的劳伦斯》 ［１９６２］ 和《日瓦戈医生》 ［１９６５］ ）。
Usain (St Leo) (b.1986), Jamaican athlete. At the 2008 Olympic Games in Beijing he won gold medals in the 100 metre and 200 metre races, setting a new world record time for each. He also won a gold, and set a new world record, as part of the Jamaican 4×100 metre relay team
博尔特，乌塞恩（·圣莱奥）（生于１９８６年，牙买加运动员； ２００８年在北京奥运会上，他一人独得男子１００米和２００米比赛的金牌，并创造了两项新的世界纪录；他还参加了牙买加的４×１００米接力赛，同样赢得金牌，并创造了新的世界纪录）。
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a bolt from （或out of ）the blue a sudden and unexpected event or piece of news 意外事件（或消息）the job came like a bolt from the blue ． 得到这份工作是出乎预料的事 -
［ORIGIN with reference to the unlikelihood of a thunderbolt coming from a clear blue sky．］
bolt upright with the back very straight 笔直she sat bolt upright in bed ． 她笔直地坐在床上 -
have shot one's bolt informal have done all that is in one's power 〈非正式〉 竭尽全力
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boltn.大金属栓；弩箭；闪电；霹雳；一匹；卷边；（Bolt）人名：博尔特
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boatn.舟；小船；帆船；划子；调味汁盆；卤汁船形盆；大客轮；大小不等的船
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beltn.皮带；腰带；肩带；带状材料；条形带；环形带；重击；狠打；传送带
"Old English, ‘arrow', of unknown origin； related to Dutch
