official business

基本解释

Mandelson is in Paris on Tuesday morning on official business.
星期二的上午，曼德爾森由於公務到達巴黎。
The BEC exam tests one’s specialized vocabulary needed to draft official business letters, as well as spoken language for telephone communications.
BEC 測試考查人們起草官方商務信件所必需的專業詞滙以及電話交談的口語能力。
All our employees who have access to, and are associated with the processing of personal data, are obliged to respect the confidentiality of official business matters, including personal data.
責成能存取個人數據以及與処理個人數據有關的所有雇員遵守官方公務的保密原則，包括對個人數據保密。

Ney's office also says he had official business, too, visiting members of the Scottish parliament.
NPR: Scrutiny Falls on Those Close to Lobbyist
In theory, the president is entitled to use it at taxpayers' expense only when he is on official business.
ECONOMIST: Lexington
In addition, nothing in the order prohibits transactions for the conduct of the official business of the Federal Government by employees, grantees, or contractors thereof.
WHITEHOUSE: The White House