“directing substitution”的概念、定义、翻译、参考文献-科学参考

单词	directing substitution
释义	directing substitution Encyclopedia 理学导向取代释 directing substitution导向取代在化学合成反应中，在反应体系中引入一种或多种无机或有机添加剂（结构导向剂），或者通过外界实验条件的改变从而发生特定位置的取代，得到所需的特定结构目标产物的过程。
随便看	laser space communication Laser speckle laser speckle laser speckle imaging non-destructive testing laser speckle interfer laser spectral analysis laser spectroelectrochemistry laser spectrometry laser spectroscopy laser spectroscopy of cold atoms laser spectrum laser spectrum analyzer laser spike laser spiking laser spot tracker laser spot welding laser stability laser stage recorder laser stealth materials laser stimulated luminescent photography laser stylus laser surface modification laser surgical operation and treatment devices laser surgical operation devices lasers without inversion

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。