Think about buying an aerial with a built-in signal amplifier , especially if the television set is more than 20 feet ( six metres ) away .
特别是如果电视机与天线距离超过超过20英寸(6米),就得考虑买一个内置信号放大器的天线。
His first semiconductor amplifier had a " small cylinder coated thinly with silicon , mounted close to a small , metal plate . "
他造出的第一个半导体放大器“有一个表面涂了薄薄一层硅的小圆筒,安装在一个小金属盘上。”
Another set of sensors , called field-effect transistor amplifiers ( fet amplifier ) , are used to detect the ionization of the particle
另一个称为场效应晶体管放大器(fet放大器)的传感器的装置,用来探测粒子的电离化。
But if we want to do something about all the lies that have come our way during this political year and all the corrupting money behind them , we need to think of money not as speech but as an amplifier for speech .