OP authenticates user: If the user is not logged in or has an invalid session, he is asked to provide his login credentials.

OP验证用户的身份：如果用户没有登录或者用户会话无效，就要求用户提供登录凭证。

youdao

Import session read 33128 valid records, 3 lines can't be parsed, 2 records invalid.

表示有33128 条数据符合格式，3条数据无法解析，2 条数据有问题。

youdao

Invalid setting in the MSDOS. SYS file: An internal stack overflow has caused this session to be halted MSDOS. SYS.

文件中无效的设置选项。系统堆栈溢出，系统挂起。

youdao

Invalid setting in the MSDOS. SYS file: An internal stack overflow has caused this session to be halted MSDOS. SYS.

文件中无效的设置选项。系统堆栈溢出，系统挂起。

youdao