白垩，又名白土粉、白土子、白埴土、白善、白墡、"白墠",是一种非晶质石灰岩，泥质石灰岩未固结前的样态，呈白色，主要成分为碳酸钙，多为红藻类化石所化成·
It has been shown that the proposed model describe correctly the main features of the mechanical behaviour of the porous chalk and the influences of water interaction.
比较结果的一致性显示出提出的模型能够正确描述多孔白垩岩的力学性质的主要特征和水对多孔白垩岩的力学性质影响。
参考来源 - 多孔岩石力学性质实验研究与模拟·2,447,543篇论文数据，部分数据来源于NoteExpress
我们研究了水对多孔白垩岩的力学性质影响。
Influences of water interaction on the mechanical behaviour of porous chalks have been studied.
地下蓄水层是一些有水的岩石层，如沙岩和白垩岩。
An aquifer is a water - bearing rock stratum such as sandstone and chalk.
另一张照片中，一个男人坐在一块突出的白垩岩上，但这块岩石已经出现了明显的裂纹，很有可能会滑落。
In another shot, a man is sitting on a chalk overhang which already has a very obvious fault line running down the side.
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