信封上写着北京人民广播电台谨启。

The envelope says, "to Beijing People's radio station".

youdao

敬请__先生于本日下午参加茶会讨论…事宜。__谨启。

Mr. --requests the pleasure of the company of Mr-- to tea this afternoon to discuss…?

youdao

她在结尾用了惯常的“谨启”二字，没有提及她回来的日期。

"She ended with a conventional" Yours sincerely, "and without any allusion to the date of her return."

youdao

她在结尾用了惯常的“谨启”二字，没有提及她回来的日期。

"She ended with a conventional" Yours sincerely, "and without any allusion to the date of her return."

youdao