Similar in principle to the enclosing of parenthetic expressions between commas is the setting off by commas of phrases or dependent clauses preceding or following the main clause of a sentence.

类似将附带说明放在逗号之间规则，位在句子主要子句之前或之后语或从属子句，也应以逗号开。

There is the name of the street and the number of the doorplate on the first line, the name of the city on the second line, and follows the name of the province, state, or the area.

第二行写市名，后面加、或区名，市与和之间用逗号开。