In the article entitled “Molecular hydrogen in surface and subsurface natural gases: Abundance, origins and ideas for deliberate exploration”, Alexei V. Milkov leverages a large database to address the occurrence of molecular hydrogen (H₂) in natural gases. The stated aims involve getting new insights into the mechanisms that lead to the production of H₂ in geological habitats as well as producing tools for its deliberate exploration. This commentary discusses the definition and practical utility of some concepts employed by the author. It also provides observations suggesting that the diagnostic value of the isotopic signatures of H₂ and associated gases is more limited than what Milkov (2022) contends. I further believe the examination of the hydrogen isotopic systematics in the CH₄–H₂–H₂O ternary system presented by Milkov (2022) to be incomplete, and outline some potentially complicating factors to the proposed interpretations.

在题为“地表和地下天然气中的分子氢：丰富、起源和有意探索的想法”的文章中，Alexei V. Milkov 利用大型数据库来解决天然气中分子氢 (H ₂ ) 的出现。_{既定目标包括对导致地质生境中 H 2}产生的机制获得新的见解，并为其有意探索提供工具。这篇评论讨论了作者使用的一些概念的定义和实用性。它还提供了表明 H _{2同位素特征的诊断价值的观察结果}伴生气体比 Milkov (2022) 所主张的更为有限。我进一步认为Milkov (2022) 提出的 CH ₄ -H ₂ -H ₂ O 三元系统中氢同位素系统学的检查是不完整的，并概述了一些潜在的使所提出的解释复杂化的因素。