两种宽度的字元在单一字串里混和，因此您必须记得检查前导位元组。

Characters of both widths are mixed in a single string; therefore, you must remember to check for lead bytes.

youdao

检查指定的区域名称和命名空间uri是否与目前的项目相符，然后以64位元带正负号之整数的形式，读取目前的项目并传回内容。

Checks that the specified local name and namespace URI matches that of the current element, then reads the current element and returns the contents as a 64-bit signed integer.

youdao