He was working under the flag of the United Nations.

他在联合国工作。

《牛津词典》

YESTERDAY the flag of South Sudan was raised in front of the United Nations in New York.

昨日，南苏丹的国旗在纽约联合国总部前面冉冉升起。

youdao

YESTERDAY the flag of South Sudan was raised in front of the United Nations in New York.

昨日，南苏丹的国旗在纽约联合国总部前面冉冉升起。

youdao