6.partial differential equation of hyperbolic type
双曲型偏微分
7.It leads to one simple equation, which, in the isotropic case, is the bipotential equation .
因为它可以推出一个简单的，各向同性的情况下，这个简单是一个双位势。
8.it thus follows from this equation that the value must be negative.
因此根据这个公式其值必为负数。
9.if we sum these equations we obtain X.
如果我们把这些式相加，就能求得X 。
10.reduce an equation to its simplest form
将简化为最简单形式
11.The equation of ESR linear regression and the sequence of geochronometry are built;
建立了ESR线性回归和测年序列 ;
12.Observational studyaims at the approach to a dynamic system whose equation is undeterminable.
该组的解有限时段上的采样值与给定序列重合。
13.x + 2y = 7 is an equation. “x + 2y = 7”
是式。
14.There is an equation between unemployment and rising crime levels.
失业人数增加则犯罪数量增加。
15.The availability of public transport is also part of the equation.
公共交通的便利也是考虑因素之一。
16.According to the nature of two-dimensional biharmonic equations,this paper obtains a polynomial solution of the biharmonic equation for stress function by means of the MATHEMATICA software.
根据二维双调和的特点并借助于MATHEMATICA软件,得到了应力函数双调和的多项式解答。
17.Set up a curvilineal equation of acid-base titration,and every pHysics meanings in the equation and factors of the effect its titrate suddenly jump range were discussed.
建立了酸碱滴定的滴定曲线,并讨论了中各项的物理意义及影响滴定突跃范围的因素。
18.Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换与约束显含时间的等价性，提出了定常约束与定常系统判据的等同表述。
19.If you later add more equations to the paper before the referenced equation, all the equations will automatically renumber and the cross-references will update.
。
义词
词
一起;
分
各向同性的情况下，这个简单
