fundamental force
noun/ˌfʌndəmentl ˈfɔːs/
/ˌfʌndəmentl ˈfɔːrs/
(specialist)- a force that is a property (= characteristic) of everything in the universe. There are four fundamental forces including gravity and electromagnetism.
基本力（宇宙万物所具有的特性，包括引力和电磁力等四种）