fulcrum
noun uk/ˈfʊl.krəm/ us/ˈfʊl.krəm/ fulcrums or fulcra /ˈfʊl.krə/ /ˈfʊl.krə/
[ C ] physics specialized（杠杆的）支点，支轴
the point at which a bar, or something that is balancing, is supported or balances
A seesaw balances at its fulcrum. 跷跷板在支点处保持平衡。
[ S ] formal支柱；关键点
the main thing or person needed to support something or to make it work or happen
The fulcrum of the debate/argument is the individual's right to choose. 辩论／争论的中心点在于个人进行选择的权利。