调整天线的位置和方向以达到最佳接收效果。Adjust the aerial's position and direction for the best reception.编码信号由碟形卫星天线接收。The coded signal is received by satellite dish aerials.大约6万用户拥有特殊的适配器来接收和转换信号。About 60,000 subscribers have special...
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...