聚集索引和非聚集索引之间的区别是什么?

我对DB的接触有限，只是作为应用程序程序员使用过DB。我想知道关于聚集和非聚集索引。 我在谷歌上搜索了一下，我发现:

A clustered index is a special type of index that reorders the way records in the table are physically stored. Therefore table can have only one clustered index. The leaf nodes of a clustered index contain the data pages. A nonclustered index is a special type of index in which the logical order of the index does not match the physical stored order of the rows on disk. The leaf node of a nonclustered index does not consist of the data pages. Instead, the leaf nodes contain index rows.

我在SO中发现的是聚集索引和非聚集索引之间的区别是什么?

有人能用通俗易懂的语言解释一下吗?