This comment concerns a rightful doubt involved in the above paper. In the reviewed article, a novel model without empirical constants was proposed to evaluate the effective thermal conductivity of three-phase soils, and such a model was claimed to be workable for soils with porosity ranging from 0.0349 to 0.4764 at all saturation degrees. However, sufficient reasons and pictorial explanations were given in this comment to prove its inapplicability for high degrees of saturation. Besides, the inapplicable range is constantly changing, depending on the porosity, i.e. the larger the porosity, the smaller the inapplicable saturation region. Similar issues were further discussed due to its great influence on the follow-up research in this field, i.e. whether can achieve a full coverage of the applicable saturation range [0,1] for a given porosity.

该评论涉及上述论文中应有的合理怀疑。在这篇评论文章中，提出了一种没有经验常数的新型模型来评估三相土壤的有效导热系数，并声称该模型适用于在所有饱和度下孔隙率为0.0349至0.4764的土壤。但是，在此注释中给出了充分的理由和图形解释，以证明其不适用于高饱和度。此外，不适用的范围根据孔隙率而不断变化，即孔隙率越大，不适用的饱和区域越小。由于该问题对该领域的后续研究影响很大，因此进一步讨论了类似的问题，即，对于给定的孔隙度，是否可以完全覆盖适用饱和度范围[0,1]。