UNIT 1 同位语跟在所修饰的名词之后,可表示相同的事物或人,也可对 该名词进行说明。同位语与所修饰的名词之间可以用各种标点符 号隔开,这时同位语可以对标点符号前的整个句子进行说明 x PCM is dependent on three separate operations sampling, quantizing, and coding Substances fall into three groups conductors semiconductors and insulators. x The laser is able to amplify light one unique property. x(9-4) can only be applied provided that the unsaturated gain coefficient exceeds the losses a necessary requirement for oscillation. 这里列举了同位语位于句尾,修饰最后一个名词或整个句子的情 况。还有其它的情况,课文中遇到时在讲。UNIT 1 同位语跟在所修饰的名词之后，可表示相同的事物或人，也可对 该名词进行说明。同位语与所修饰的名词之间可以用各种标点符 号隔开，这时同位语可以对标点符号前的整个句子进行说明。 PCM is dependent on three separate operations, sampling, quantizing, and coding. ＊ Substances fall into three groups: conductors, semiconductors and insulators. ＊ ＊ The laser is able to amplify light ⎯ one unique property. (9 -4) can only be applied provided that the unsaturated gain coefficient exceeds the losses , a necessary requirement for oscillation. ＊ 这里列举了同位语位于句尾，修饰最后一个名词或整个句子的情 况。还有其它的情况，课文中遇到时在讲