词汇	累加符号
释义	累加符号 summation sign
随便看	single requesting terminal program single requesting terminal programSRT single requesting terminal program srt single research expenditure single residence single resolutely single resonance single-resonance level single resonant circuit single-resonant circuit single-resonant optical parametric oscillator single resonator single resonator laser amplifier single-resonator laser amplifier single resource single resource scheduling single-response receiver single responsibility principle single resurf single retort stoker single retort underfeed stoker single-retort underfeed stoker single-return wind tunnel single reversal permanent magnet single-reversal permanent magnet