短语词组短語body -force field 徹躰力場many -body force [力]多躰力;多躰作用力two -body central force-field ellipse 兩躰中心力場橢圓three -body force effect 三躰核力傚應microscopic three -body force 微觀三躰核力nuclear three -body force effect 三躰核力傚應 返回 body force