标题(title)，简短的、人类可读的记录主体行；允许使用空字符串(用空的标题元素表示，如)。

A title, which expresses a short, human readable subject line for the entry, and can be a blank string (represented by an empty title element, such as).

youdao

标题(title)，简短的、人类可读的记录主体行；允许使用空字符串(用空的标题元素表示，如)。

A title, which expresses a short, human readable subject line for the entry, and can be a blank string (represented by an empty title element, such as).

youdao