In chapter 7, the structure and the working principle of the gas hydrate temperature-hold and pressure-tight sampling corer are discussed. 第七章分析了天然气水合物保温保压取样器的结构和工作原理。
Putin joined the team of scientists studying gas hydrates and natural seepage of crude oil on the bottom of Baikal on Saturday. 在周六与普京随行的是一队科学家，他们负责研究天然气水合物，以及贝加尔湖湖底原油的自然渗漏问题。
