n. 〔门、窗的〕金属插销，闩

n.  螺栓

v.  奔，窜

v.  狼吞虎咽 ≈ gobble 

v.  用螺栓扣住

v.  闩上，插上〔门或窗〕

• a bolt from/out of the blue 

  突如其来的消息；晴天霹雳

• sit/stand bolt upright

  〔常因受到惊吓〕挺直地坐着/站着

• Was this money a bolt from the blue or did you know you were going to get it? 这是一笔意料之财呢，还是你本来就知道会有的？

• She sat bolt upright in the back seat.

  她直直地坐在后座上。