to whom it may concern
US /tə huːm ɪt meɪ kənˈsɜːrn/
UK /tə huːm ɪt meɪ kənˈsɜːrn/

1.
敬启者
a formal salutation used when the recipient's name is unknown or when the letter is addressed to an organization rather than an individual
:
•
I started the cover letter with 'To Whom It May Concern' as I didn't know the hiring manager's name.
我用“敬启者”开头了求职信,因为我不知道招聘经理的名字。
•
The official notice was addressed 'To Whom It May Concern'.
官方通知的抬头是“敬启者”。