Similarly, "identifiers" such as ISBN, OCLC number, LCCN, and library barcode number are used as key strings but are only identity indicators with varying strengths.

相似的，像ISBN、OCLC控制号、LCCN以及图书馆条码号这些“识别符”都是重要的字符串，它们都是识别的指示符，但是作用的大小各有不同。

youdao

Similarly, "identifiers" such as ISBN, OCLC number, LCCN, and library barcode number are used as key strings but are only identity indicators with varying strengths.

相似的，像ISBN、OCLC控制号、LCCN以及图书馆条码号这些“识别符”都是重要的字符串，它们都是识别的指示符，但是作用的大小各有不同。

youdao