在过去的一部分时间里，人们没有温度计测温，那些研究过程就使用具代表性的数据，比如树木的年轮来衡量。
For parts of the past where there were no thermometers to consult, such studies use proxy data, such as tree rings.
为了确保热电偶温度计测温的准确性，不仅在出厂时要对它进行严格检定，而且在随后的使用过程中还要进行周期性检定。
To ensure the thermocouple's veracity, it must be verified strictly before it is sold, and be calibrated periodically in the process of its use.
本文基于推导多波长辐射温度计的理论，推出了一种三波长辐射测温法的新关系式，并建立了三波长辐射温度计的数学模型。
This paper presents a new relationship of three-wavelength radiation pyrometer by a theory of multi-wavelength, and establishes a three wavelength mathematical model.
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