I heard the sound of a bolt being slowly and reluctantly slid open.
我听到门闩被人缓慢而费劲地抽出来的声音。
The safety belt is easy to fit as there's no need to bolt it to seat belt anchorage points.
这种安全带很容易安装,因为不需要把它拴在安全带固定点上。
When I pushed his door open, Trevor was sitting bolt upright in bed.
我推开他的门时,发现特雷弗正笔直地坐在床上。