Previously, this attribute existed only on elements like blockquote.
以前该属性只能用于 blockquote 这类属性。
The usage of BLOCKQUOTE to indent text is deprecated in favor of style sheets.
用BLOCKQUOTE来缩进文本的用法是不推荐的，应采用样式表。
This example uses the BLOCKQUOTE element to set off a quotation that renders as indented text.
示例代码下面的例子使用了BLOCKQUOTE 元素将文本设置为引用语，效果是缩进显示。
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