“支撑轴”常见的英文表达是 supporting shaft 。其中,“supporting”有“支撑的、起支撑作用的”意思 ,“shaft”指“轴;杆状物” 。
例如:The supporting shaft plays a crucial role in maintaining the stability of the entire mechanical structure.(支撑轴在维持整个机械结构的稳定性方面起着至关重要的作用。)