| 1. | The simplest non-trivial groups are those of order 2 .
最简单的非平凡群是一些二阶的群。 |
| 2. | The function (f')is usually written simply f" and is called the second derivative .
函数（f’）通常简写成f”，并称之为f的二阶导数。 |
| 3. | An important case is the linear homogeneous second-order differential equation with constant coefficients .
一种重要的情形是常系数二阶线性齐次微分方程。 |
| 4. | The solution of the set of second-order linear differential equations (6.10) depends on the eigenvalues of a .
二阶线性微分方程组（610）的解依赖于A的特征值。 |
| 5. | The two-moment description tells where the ions are located and roughly how broad the distribution is .
二阶矩描述给出了离子的停止位置，并粗略地给出分布的宽度。 |
| 6. | In other coordinates it will involve second and possibly first derivatives with respect to time .
在别的坐标系中，它除了包含对时间的二阶微商外，还可能会包含对时间的一阶微商。 |
| 7. | The second-order determinant that multiplies a given element is found by crossing out the row and column in which that element appears .
乘给定元素的二阶行列式是删去该元素出现的行和列而得到的。 |
| 8. | It is a remarkable feature of the theory of mechanics that all motion can be described without reference to derivatives higher than the second .
力学理论有一个显著的特点，它可以描述所有的运动而不需涉及二阶以上的导数。 |
| 9. | Oscillation of second - order delay differential equation
二阶时滞微分方程的振动性 |
| 10. | Scale function of the secondorder spline in space h
空间中二阶微分算子的尺度函数 |
