您要查找的是不是：
- Strangeness is assumed to be a conserved quantity in all interactions that are not weak. 假定奇异性是除弱相互作用以外的所有相互作用中的一个守恒量。
- In your collaborations, always remember that “credit” is not a conserved quantity. 要知道，在合作中，荣誉不是一个定数。
- time-dependent conserved quantity 含时守恒量
- generalized Hojman conserved quantity 广义Hojman守恒量
- Mei Fengxiang.Lie symmetries and conserved quantities of holonomic systems with remainder coordinates. 张毅.;单面约束力学系统的基本理论研究:[博士学位论文]
- Starts with Kepler three laws,and an alyzes the conservational quantity in this kind of motion. 从开普勒三定律出发,分析这类运动中的守恒量。
- Based on Hamilton's variational principle,this peper proves that,for a system which is symmetric to some transformation there must be a conservative quantity. 本文从哈密顿变分原理（以下简称哈密顿原理）出发，讨论当一个系统存在某种对称性时，哈密顿原理便可给出此系统存在一个守恒量。
- New Conserved Quantity Constructed upon Form Invariance for Holonomic Systems 完整系统形式不变性导致的新守恒量
- Then, we find the Yang-Baxter equation satisfied by the monodromy matrix defined through Lax operator. Infinite conserved quantities can be obtained by expanding the monodromy matrix repecting to the spectrum parameter. 接着找到了由Lax矩阵所定义的monodromy矩阵所满足的Yang-Baxter方程(YBE)，利用monodromy矩阵对谱参数的展开可找出无穷多守恒量，从而证明了此模型的可积性；
- Through the discussions of the symmetries and conservation laws.This article provides reliable theoritical foundation for the study of certain conservation quantity or the physical equation. 本文通过对称性与守恒定律的讨论，探讨了某些物理守恒量或物理方程的理论基础。
- In our work quality counts for as much as quantity. 在我们的工作中，质量跟数量同等重要。
- Ifs cheaper to buy goods in quantity. 大量地购物要便宜些。
- Effects of mass variation on form invariance and conserved quantity of mechanical systems 质量变化对力学系统形式不变性和守恒量的影响
- Form invariance and non-Noether conserved quantity for holonomic mechanical systems with remainder coordinates 有多余坐标完整力学系统的形式不变性与非Noether守恒量
- Unified Symmetry and Conserved Quantity for Holonomic Mechanical Systems with Remainder Coordinates 有多余坐标完整系统的联合对称性及其守恒量
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- Time, place, quantity and quality are categories. 时、空、质、量都是范畴。
- Quality often matters more than quantity. 质量往往比数量更重要。
- Non-Noether symmetrical conserved quantity for nonholonomic Vacco dynamical systems with variable mass - 中国物理：英文版 - 乔永芬,李仁杰,赵淑红
