She's an insomniac; she only sleeps for two or three hours a night.她患失眠症, 每晚只睡两三个小时.The insomniac is habitually afflicted with wakefulness at times when he wishes to sleep.失眠症患者,这种病人在他想睡觉时经常特别清醒....
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.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.We use saccha...
卡西: 今天早上玛勒美容院发生的一件事真精采!Cassie: There was such a drama at Marla's Beauty Salon this morning!布鲁内利对玛勒将来是否会成为一名画家持保守态度.Mr Brunelli's assessment of Marla's prospects as an adult artist are cautious....