Perhaps this is because the very texture of a performer's voice supplies an element of character.
也许这是因为表演者声音的质感本身就提供了一种个性元素。
The ? character means to match zero or one instance of the previous pattern element; the * character means to match zero or more of the previous element.
字符表示匹配前面模式元素的零个或一个实例,* 字符表示匹配前面元素的零个或多个实例。
The root of the tree is the document itself, and each node corresponds to an element or character data.
树的根是文档本身,每个节点对应于一个元素或字符数据。
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