常見例句This paper simply analyzes pulse generating circuit,pre amplifier,power amplifier through examples. 通過實例對脈沖發(fā)生、預放(敺動)、功放電路進行了簡要分析。I bought an amplifier yesterday. 我昨天買了一個擴音器。pre amplifier 前置放大器Cook the pie for 20 minutes in a pre heated oven. 在經過預熱的烤箱裡烘烤餡餅20分鍾.The pre - christmas period be always very busy . 聖誕節(jié)前這一段時間縂是很繁忙的。A gradual change in the output of a circuit or amplifier. 逐漸改變電路或放大器輸出功率的逐漸改變 返回 pre-amplifier