This is a real advantage, says Renato Zenobi, a mass spectrometry expert at the Swiss Federal Institute of Technology in Zurich.

这确实是其优势所在，苏黎世瑞士联邦技术研究所的一位质谱专家Renato Zenobi说。

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"You need to show there is a core individual signal that is stable over time, " Prof Zenobi said.

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