substitution

例句与用法

Severe steric effects at the reactive carbon would impede the substitution .
大的立体效应阻止在碳上的取代。
The tendency to substitution may be overborne by a contrary tendency .
替代的趋势也许会被一种相反的趋势所压倒。
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。
The substitution of a purine for a pyrimidine, or vice versa is a transversion .
嘌呤为嘧啶取代或嘧啶为嘌呤所取代，叫做颠换。
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。
The elasticity of substitution is a useful concept in several areas of economics .
置换弹性在若干经济学领域内是一个有用的概念。
Many groups can be added by nucleophilic substitution on a diazonium salt .
许多基团可通过向得自胶的重氮盐作亲核取代而加以导入。
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。
It is usually best to avoid substitution of numerical values until the final formula has been obtained .
在得到最终公式以前最好不要代入数值。
Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts .
大多数连于芳核能被直接取代的基团仅限于重氮盐。