瞬心 瞬心的英文 英语翻译 instantaneous center(of rotation) 拓展翻译 瞬心迹centrode瞬心线centrode; centroid瞬twinkling; wink瞬变的transient瞬变电流transient current瞬变电压transient voltage瞬变过程transient瞬变扩展法transitional expanding method瞬变流transient wave瞬变期transient period瞬变时间transition time瞬变现象transient phenomena瞬变延迟transient delay瞬变值transient瞬变状态transient state瞬动开关instant-on switch瞬发γ射线prompt gamma瞬发中子prompt neutrons瞬发中子活化分析prompt neutron activation analysis(PNAA)瞬间instant; moment; blink; breath; split second; twinkling; winkmoment