碳定年法和红外线分析法对这幅作品作出的分析鉴定支持了上述说法。
Carbon dating and infrared analysis of Leonardo's techniques back up the theory.
根据群落的垂直结构和成层现象，应用红外线CO_2气体分析法，分层测定了主要植物22种58株的光合速率。
The photosynthetic rates of 58 individuals of 22 main species at different layers of community were measured with an infrared CO_2 analyzer.
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