Use polite language and a friendly tone of voice.

使用礼貌的语言和友好的语气。

youdao

You should also remember to smile as you speak, and use a friendly tone.

你还应该记得说话时要微笑，并使用友好的语气。

youdao

I was pleased with my friendly tone.

我对自己友好的语调非常满意。

youdao

Those picks do not include a single investor candidate and perpetuate a white-male, insider, auditor-friendly tone that makes me quite pessimistic.

FORBES: SEC Stacks The Deck Against Investors At PCAOB

Previous class members mingle with candidates before their interviews in an effort to loosen everybody up and set a friendly tone.

FORBES: Magazine Article

At the same time he said the conversations we had were friendly in tone - that is correct as well.

BBC: Scotland politics