| 1. | An important method for evaluating integrals is a change in variables .
求积分值的一种重要方法是变量代换法。 |
| 2. | We see immediately that after substitution the real part of each term is 0 .
我们立即看出，在代换之后，每项的实数皆为零。 |
| 3. | It is convenient to nondimensionalize this problem with the following substitutions .
利用下面的代换，便于使这个问题无量纲化。 |
| 4. | The trigonometric terms should be changed by the substitution of the equations involving the double angles .
用倍角公式代换三角函数项。 |
| 5. | In fact, we could make the substitution and still wind up with the correct eigenfunctions and eigenvalues .
事实上，我们可以做这种代换而仍能绕弯得出正确的本征函数和本征值。 |
| 6. | How to use trigonometric function in mathematics
谈谈如何利用三角代换求函数最值 |
| 7. | Design of chaos multi - table substitution ciphers
混沌多表代换密码的设计 |
| 8. | Solving linear differential equations with variable substitution
用变量代换求解几类线性微分方程 |
| 9. | Replaceable principles of equivalent infinitesimal in limit operation
极限运算中的几个等价无穷小代换法则 |
| 10. | Development and advances of single segment substitution lines in rice
水稻单片段代换系群体的构建及研究进展 |
