fundamental force
noun [ C ] physics specialized uk/ˌfʌn.dəˈmen.təl ˈfɔːs/ us/ˌfʌn.dəˈmen.t̬əl ˈfɔːrs/
基本力（即决定物质间相互作用的四种力：电磁力、重力、强力和弱力）
any of the four forces in nature that are responsible for the way that matter behaves: electromagnetic force, gravity, strong force, and weak force