in a way that involves diplomats or the management of the relationships between countries

The government has demonstrated its commitment to end the crisis diplomatically. 政府已表明其以外交方式结束危机的承诺。

They are making an effort to isolate the island diplomatically. 他们正努力从外交上孤立该岛。

in a way that does not cause offence

"I liked all of the competition entries," she said diplomatically. “所有的参赛作品我都喜欢，”她圆滑地说。

He had to choose his words diplomatically. 他得小心地选择委婉的措辞。