I infer his bad mood from his cold tone of voice.

 从他冷淡的说话语气， 我推敲出他的坏心情。

youdao

Gun-color plating is named because the steel blue color shining with cold tone on the plated surface is similar to, that on the steel gun surface.

枪色电镀因其表面呈现铁灰色、闪现寒光的色调，类似于钢枪表面的光色因而被命名。

youdao

This paper introduces two types of new photogrphic toning agents recently disclosed by 3M and Kodak, used for transforming warm tone of b /w film into cold tone.

本文介绍了美国3M公司及柯达公司最新推出的两类调色剂，可将黑白影像胶片的色调由暖调有效地调为冷调。

youdao

So far, Moscow has rebuffed American appeals to tone down its Cold War-style rhetoric.

NPR: Rice, Gates Appeal to Moscow for Missile Defense

Mr Afshar says at first he noticed when they talked, his dad's tone was a little cold but now his father also seems relieved.

WSJ: Setting Boundaries With Family Members

The book's final chapter, however, takes on a more regretful tone as the author turns his attention to climate change and what it means for cold places.

ECONOMIST: Low temperatures