Scheme defines a list as being either the null list or a pair whose bottom half is a list.
Scheme将一个列表定义为一个空列表,或者是一个下半部分为某个列表的pair。
The last example, (), is used to refer to the empty, or null, list.
最后一个示例 ()用来表示一个空列表。
The last example, (), is used to refer to the empty, or null, list.
最后一个示例 ()用来表示一个空列表。
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