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| 11. | the desired species(element, isotope, and charge state)is certified by the signature of the entire mass |
| 所需物质（元素、同位素及电荷态）的选择，被全部质谱的信号特征所证实。 |
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| 12. | quasi-equilibrium theory of mass spectrum |
| 质谱的似平衡原理 |
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| 13. | a mass spectrometer that produces a graphical representation of the mass spectrum. |
| 能够产生质谱的绘画表现的一种分光计。 |
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| 14. | an instrument for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion |
| 通过把离子偏转到狭长切口并用静电计测量离子流获取光谱的仪器。 |
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