After a littleexploration through the thick growth of kelp and sea grass, he picks up apromising-looking rock about the size and shape of a slightly melted bowlingball.
2
根据体积平均理论，建立多孔介质中融化相变过程自然对流模型。
Based on volume averaging theory, natural convection model for melting phase change in porous media was established.
3
冻土在冻结、融化的过程中，伴随着土中水的冻结和融化，土的体积也随之发生变化。
The volume of frozen soil will change because of the moisture freezing or thawing.
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