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| 1. | 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。 |
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| 2. | service by substitution |
| 代理送达 |
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| 3. | definition by substitution |
| 用置换定义 |
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| 4. | The nature of dollarization is the substitution of home currency by certain foreign hard currency. |
| 美元化的本质是本国的货币被外国强势货币替代。 |
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| 5. | integration by substitution |
| 代换积分法 |
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| 6. | 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。 |
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| 7. | elimination by substitution |
| 代入消元法 |
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| 8. | In this paper we give a remark on integral by substitution, which is useful to avoid erroneous calulation |
| 换元积分法是求不定积分的一种常用方法，但在使用中由于忽略某些条件而产生错解和漏解的情况也时有发生，本文提出了使用换元积分法的两点注记，可以减少或避免出现错解和漏解。 |
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| 9. | oil extraction by water substitution |
| 水代法取油 |
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| 10. | The sartorius muscle was processed by conventional chemical fixation and cryofixation followed by freezing |
| 方法：蟾蜍缝匠肌经常规化学固定以及超低温快速冷冻固定、冷冻置换后，透射电镜进行超微结构观察。 |
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