This matter must be handled by going through diplomatic channels.

这件事情得经过外交途径才行。

youdao

The warning is likely to be delivered through diplomatic channels.

这个警告可能要通过外交途径传达了。

youdao

The date for the visit will be decided through diplomatic channels.

访问日期将通过外交途径商定。

youdao

And I think he realizes that the only way to resolve this really is through diplomatic channels.

NPR: Iran, Britain at Impasse over Captives

So far Iran has said nothing publicly and apparently given no clear response through diplomatic channels either.

BBC: Analysis: British yacht crew detained by Iran

"We continue to explore all avenues privately and through diplomatic channels to convince the Syrian government to release Jim so that he can return to his family, " Balboni said.

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