1、专 业 英 语,Specialized English,Unit 20：,第二部分 通信技术,ImageVideo,NEW WORDS AND PHRASES,NEW WORDS AND PHRASES,This technique works because any color can be constructed from a linear superposition of red，green，and blue with the appropriate intensities superposition：重叠， 重合， 叠合 全句可译为：之所以采用这种技术，是因为任何一种颜色都可以表示为红
2、、绿、兰三种颜色适当浓度的线性组合。,TEXT,To allow color transmissions to be viewed on black-and-white receivers，all three systems linearly combine the RGB signa1s into a luminance (brightness) signal，and two chrominance (color) signals，although they all use different coefficients for constructing these signals from
3、the RGB signa1s 全句可译为：为了使黑白接收机能接收到以彩色传输的信号，尽管从RGB信号得到亮度和色度信号时它们使用了不同的系数，这三种系统都从RGB信号线性组合出了一个亮度信号和两个色度信号。,The local distribution systems reach into peoples houses，where they terminate in set-top boxes，which are， in fact， powerful，specialized personal computers set-top boxes：机顶盒 distribution systems：分
4、发系统 本句可译为：本地分发系统到达（被接入）人们家里，终止于机顶盒。事实上，机顶盒是功能强大的特种个人计算机。,Large mechanical tape servers that hold thousands of tapes and have a robot arm for fetching any tape and inserting it into a tape drive are commercially available now that hold thousands of tapes and have a robot arm for fetching any tape and inserting it into a tape drive是非限定性定语从句，修饰前面的servers。fethingandinserting是并列的目的状语，做for的目的状语。 全句可译为：大型的机械磁带服务器可容纳上千盒录像带，它的机械手可以取到任意一盒录像带，并把它塞入录像驱动器，这种服务器现在在商业上是可行的。,
