bolt upright
adverb
uk/ˌbəʊlt ˈʌp.raɪt/us/ˌboʊlt ˈʌp.raɪt/verticaland verystraight:
直立地Suddenly shesatbolt upright as if something hadstartledher.她突然直挺挺地坐了起来,好像受了惊吓似的。
Geometry: describing angles, lines & orientations
- acute
- angle of incidence
- angularity
- antinode
- asymptote
- asymptotic
- circuitous
- equilateral
- glancing
- indirect
- non-planar
- noncollinear
- obliquely
- obtuse
- orthogonal
- osculate
- projection
- prominent
- rectilinear
- reflection