| 1. | This is called a normal system of differential equations .
这称为正规微分方程组。 |
| 2. | Newton's second law can be expressed as a differential equation .
牛顿第二定律可表达成微分方程。 |
| 3. | To some extent, his work pays dividends in differential equations .
他的工作在某种程度上给微分方程带来了好处。 |
| 4. | The theory of the solution of partial differential equations remained to be fashioned .
偏微分方程解的理论还有待于形成。 |
| 5. | His work remains mathematically in the realm of ordinary differential equations .
他的工作在数学上就停留在常微分方程的范围。 |
| 6. | Very general systems of differential equations can be reduced to the normal form .
形式很普通的微分方程组可以化为正规的形式。 |
| 7. | The more recent research on differential equations is concerned with the qualitative theory .
对微分方程更近代的研究是关于定性理论。 |
| 8. | His doctoral dissertation on differential equations connected itself with existence theorems .
他论述微分方程的博士论文涉及到存在理论。 |
| 9. | The overwhelming majority of nonlinear differential equations are not soluble analytically .
绝大多数非线性微分方程是不能用解析方法求解的。 |
| 10. | Systems of linear differential equations can be handled by using the methods of linear algebra .
线性微分方程组可以应用线性代数中的方法求解。 |
