一致质量矩阵与集中质量矩阵是结构动力分析中常用的质量矩阵形式。
Consistent mass matrix and lumped mass matrixes are the common types of mass matrixes in structural dynamic analysis.
学报质量是一个整体概念，它是学术水平与出版形式的完美统一体；
The quality of college journals must be viewed as a concept for the sake of the whole.
与电系统稍有不同的是，这种方法需将机械系统结构图作适当的改形。改形也很简单，只要将串联形式的质量元件改为并联即可。
Differing from electrical system, the structural diagrams of mechanical system need the change of series combinations of mass elements into parallel combinations, which is very simple.
砼桩基础是建筑、桥梁建设中最普遍的基础形式和处理方法，桩基施工的质量好与坏直接影响整个工程的质量和安全。
Pile foundation is the most popular form during the construction of the civil and bridge engineering. The quality of the pile directly influences the whole engineering's quality and safety.
负质量是一种假象的物质形式，其质量在标示上与正常的正质量相反。
Negative matter is a hypothetical form of matter whose mass is opposite in sign to normal positive matter.
负质量是一种假象的物质形式，其质量在标示上与正常的正质量相反。
Negative matter is a hypothetical form of matter whose mass is opposite in sign to normal positive matter.
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