isotopesn.同位素名词isotope的复数形式.isotopen.同位素isotope production tunnel同位素生产管道isotope sialographic unit同位素涎腺摄影仪isotope mass spectrometer同位素质谱仪Isotope mass spectrometry同位素质谱isotope packaging machine同位素分装机isotope-velocity method同位素测流速法isotope cluster technique同位素群集技术, 同位素峰群技术isotope separator on line在线同位素分离器isotope internal standard同位素内标isotope tracer measurement同位素示踪测量