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.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....
My skin pricks sometimes.我的皮肤有时感到刺痛.You must obey the rule. It is useless for you to kick against the pricks.你必须遵守规定, 对抗对你是无益的.In appealing the case again , you will just be kicking against the pricks.你在上诉, 那简直就是自讨苦吃....
Scientists observe the same dynamics in fluids.科学家们在液体中观察到了同样的驱动力。Let's observe a minute's silence in memory of the dead.让我们为死者静默一分钟.We must observe the correct protocol.我们必须遵守应有的礼仪....
mawkish love story伤感的爱情故事A sordid, sentimental plot unwinds, with an inevitable mawkish ending.一段灰暗而感伤的情节慢慢展开，最后是一个不可避免的幼稚可笑的结局。Such feelings infuse Ekhrajiha, which is nonetheless an odd mix of slapstick humour and mawk...
She decides to use charts and diagrams to illustrate.她决定用图表来说明。Don't clutter the page with too many diagrams.别用太多的图表来堆砌版面。...simple pictures and diagrams.简单的图画和图表Diagrams and graphs are indispensable visual aids in ...