本发明提供一种用来将一输入信号降频为一输出信号的混频器.The invention provides a mixer which an input signal into an output signal through frequency reduction.直接降频转换接收器架构能够以较低成本提高无线系统基站接收器的性能.Framework of direct - down conversion receiver can provi...
The third century AD, ancient Rome, there was a tyrant called Clausius Meadows ( Claudius ).公元三世纪时, 古罗马有一位暴君叫克劳多斯 ( Claudius ).Claudius always doubted what he heard from his men.克劳迪斯总是怀疑从他的手下那边听来的消息.In 2000, John Updike ...
他想通过计算机实现流程的自动化。He wanted to use computers to automate the process.自动化气象站将风向信息输入计算机。An automatic weather station feeds information on wind direction to the computer.自动化会使工作周缩短，也更为灵活。Automation would bring a shorter, more...
Satellite lifetimes in orbit range from a matter of days to hundreds of years.卫星在轨道上的寿命从几天到几百年不等.The range offers higher speeds, interchangeability and longer lifetimes.范围内提供更高的速度, 互换性和更长的寿命.Wealth always passed by these...
我听到身后跑鞋有节奏地噔噔噔地响着。I heard the regular thud thud thud of running shoes behind me.跑鞋有额外的减震设计。Running shoes have extra cushioning.内森的新跑鞋不太合脚。Nathan's new running shoes weren't broken in correctly....
This afternoon the Palestinians held an impromptu press conference.今天下午巴勒斯坦方面临时召开了记者招待会。They demand self - autonomy for the Palestinians.巴勒斯坦人民要求 自治.Shelling a short time later killed two more Palestinians.不久之后,又有炮火击毙了两名...
Altogether seven inmates escaped by scaling a wall and climbing down scaffolding.总共有7名犯人攀墙从脚手架上爬下来逃走了。I'd like to have 100 sheets altogether.我一共想要100张。Britain has a dozen warships in the area, with a total of five t...