同位语出现时,可以没有标志,如:Shanghai,once the paradise for adventurers,is now the largest industrial base in China.(上海,曾经是冒险家的乐园,现在是中国最大的工业基地。)但也可以有标志,这些标志一般位于同位语前面,少数可前可后,个别只能放在后面。现对这些标志介绍如下,以供读者参考。 一、句子 如let us say,that is(to say)。 When an appositive appears, there can be no sign, such as: Shanghai, once the paradise for adventurers, is now the largest industrial base in China. (Shanghai, once a paradise for adventurers, is now China’s largest industrial base.) But it can also be There are signs. These signs are usually located in front of the appositives. A few can be forwarded and some can only be placed behind. These signs are introduced below for the reader’s reference. A sentence such as let us say, that is (to say).