四川邮电职业技术学院教案专用纸 to(7')the communication engineer. Basically, if the signal is very large compared to the noise leveL, (7a)then a perfect message can take place; however, this is not always the case(7b) 正是这种被称为信噪比的即真实信号与噪声的关系引起了通信工程 师的极大的兴趣.从本质上讲如果信号比噪声电平大得多则信息的传输 是完美的但是,实际情况并不总是这样 (7), known as the signal-to- noise ratio译为“称为信号噪声 比 (7’),Beof+n.结构 Be of importance=be important be of the most interest to= be most interesting to 7a). compared to the noise level意为:“与噪声电平相比” (7b). this is not always the case:实际情况并非如此 For example, the signal received from a satellite, located ii far outer space( 8), is very weak and is at a level only slightly above that of the noise. ALternative examples(8,)may be found within terrestrial systems where, although the message signal i strong, so is the noise power. 例如,从位于遥远太空中的卫星接收的信号极其微弱其电平仅比噪 声稍高一点.地面系统则是另一类例子足管信号很强声也很强 (8). Located in far outer space这是一种分词短语结构 located 是动词的d形式称为过去分词,起形容词的作用,在句中作定语这种 分词往往用来修饰原来动词动作的承受者例如: The trees planted by me have growm up.“我种的树已长大了.” 再例如 Electromotive force results in electrical pressure, compared to water pressure.“电动势产生电压,电压好比水压” 所以课文中的这一短语可译为:“位于远太坐中的(卫星 (81). Alternative ad.随便一个的,二者择的(三者或以 上的选择用 choice) The way was blocked, so we went by an alternative road. t 被挡住了,因此我们走了另一条路。 n.择;选择余地 I wanted to go out, but I had no alternative but to staying at home.我想出去,可是没钱,只能待在家里 have no alternative but to go on.除了继下去我们没有选 择的余地。 There was no other alternative but to fight tili the victory. 除了战↓直到胜利别无选择。 Page 8 of 12 Teaching Plan of English for Telecommunications Unit One四川邮电职业技术学院教案专用纸 Page 8 of 12 Teaching Plan of English for Telecommunications Unit One to (7’) the communication engineer. Basically, if the signal is very large compared to the noise level,(7a) then a perfect message can take place; however, this is not always the case (7b). 正是这种被称为信噪比的即真实信号与噪声的关系引起了通信工程 师的极大的兴趣.从本质上讲,如果信号比噪声电平大得多,则信息的传输 是完美的.但是,实际情况并不总是这样. （7）. known as the signal-to-noise ratio 译为“称为信号噪声 比”. （7’）. Be of + n. 结构 Be of importance=be important be of the most interest to= be most interesting to （7a）. compared to the noise level 意为:“与噪声电平相比”. （7b）. this is not always the case: 实际情况并非如此． For example, the signal received from a satellite, located in far outer space (8), is very weak and is at a level only slightly above that of the noise. Alternative examples (8’) may be found within terrestrial systems where, although the message signal is strong, so is the noise power. 例如, 从位于遥远太空中的卫星接收的信号极其微弱,其电平仅比噪 声稍高一点.地面系统则是另一类例子,尽管信号很强,噪声也很强. （8）. located in far outer space 这是一种分词短语结构.located 是动词的-ed 形式，称为过去分词，起形容词的作用，在句中作定语.这种 分词往往用来修饰原来动词动作的承受者.例如: The trees planted by me have grown up.“我种的树已长大了.” 再例如: Electromotive force results in electrical pressure, compared to water pressure.“电动势产生电压，电压好比水压” 所以课文中的这一短语可译为:“位于遥远太空中的(卫星)”. （8’）. Alternative adj.随便一个的；二者择一的 (三者或以 上的选择用 choice) The way was blocked, so we went by an alternative road.这条 路被挡住了，因此我们走了另一条路。 n. 抉择；选择余地 I wanted to go out, but I had no money. I had no alternative but to staying at home.我想出去，可是没钱；只能待在家里。 We have no alternative but to go on.除了继续下去,我们没有选 择的余地。 There was no other alternative but to fight till the victory. 除了战斗直到胜利,别无选择