That is, the token is to be replaced with a value associated with the name of the variable; or, if no value as been defined, with either the default value or an empty string.
也就是说,该标记将会被与变量名关联的值替换;如果没有定义关联值,那么就会替换为默认值或空字符串。
That is, the token is to be replaced with a value associated with the name of the variable; or, if no value as been defined, with either the default value or an empty string.
也就是说,该标记将会被与变量名关联的值替换;如果没有定义关联值,那么就会替换为默认值或空字符串。
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