Dogs trained to sniff out early signs of cancer in human breath are probably detecting large molecules captured by aerosols in the breath, rather than more volatile substances present as gases.

中文翻译：

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光谱学旨在阐明狗的发现癌症的能力

经过训练可以嗅探出人类呼吸道癌症的早期迹象的狗可能正在检测呼吸道内的气溶胶捕获的大分子，而不是更多的以气体形式存在的挥发性物质。