However, the modulation - demodulation of ultraviolet and voice transmission are the key technologies.然而, 紫外光通信的 调制解调技术 以及语音传输是整个系统的关键难点.Introduce and analyze the key module of demodulation technologies, for example NCO ...
Do you keep many books and papers and memorabilia?你是不是收藏了大量的书籍、报纸和纪念品？a swap meet for collectors of Star Trek memorabilia《星际迷航》纪念品收藏者交流会The new - opened museum exhibits memorabilia in his long career.(新落成的博物馆展出他长久生涯的重要物品...