以下为句子列表：
英文: An important issue is that the dry bulk and shear modulus of sandstone are tightly correlated in a simple relationship with distribution of porosity, mineral composition, clay content, cementation, and differential pressure.
中文: 砂岩的干燥体变模量和剪切模量与孔隙度分布、矿物成分、粘土含量、胶结度和差压的关系是严格相关的，这一点非常重要。
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英文: Calculate shear modulus based on empirical relations for dry P-wave and shear modulus, as in equation (6).
中文: 计算基于干燥P波模量和剪切模量关系的剪切模量，如方程6。
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英文: The derived dry bulk modulus must be positive and greater than 2/3 of shear modulus to insure a positive lame constant and Poisson's ratio.
中文: 提取的干燥体变模量必须为正，并且大于剪切模量的2/3，以保证拉梅常数和泊松比为正。
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英文: The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic wave propagation in the solid material to obtain the elastic module, shear modulus and poisson ratio.
中文: 摘要弹性系数的超声检测，即借助固体弹性常数与超声波波速间的固有关系，通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。
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英文: Therefore, shear modulus should have better correlation with dry P-wave modulus as shown in Figure 5.
中文: 因此，剪切模量与干燥P波模量具有更好的相关性，如图5。
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