- with the back very straight
- upright, with the back rigid and straight
Oxford American Dictionary
...that在關係子句裡屬於受詞時，可以省略。本句屬這種狀況。 （2）Sue bolted upright, her body rigid with fear. Q: 這句子中間是少了連接詞之類的嗎...
...的那個棺木追者他跑 and pictured as hopping on behind him, bolt upright, upon its narrow end, always on at his side. 想像著跟在他後面,用較...
...閂住;用螺栓固定 ad. (副詞 adverb) 突然地;直接地 筆直地 He sat bolt upright. 他筆直地坐著。