Natural gray diamonds occur within a specific region of colour tone.

天然灰色钻石发生在一个特定的地区色彩基调。

youdao

The application of visual reflectance, colour tone, saturation degree and colorimetric coordinates of colour index are all useful for qualitative observation.

本文阐述了颜色指数的视觉反射率、色调、饱和度、色度坐标在定性观察方面的应用。

youdao

He has found that their brains remodel to use variations in pitch, tone and volume - in the same way sighted people use differences in light and colour - to build up a picture of their surroundings.

他发现，他们的大脑会重组成使用不同的音阶、音调和音量——我们的视力也是用同样方式感知亮度和色彩的差别——以建立自身周围环境的图像。

youdao

After several hours of this, learning the difference between a four-day-old horse and a cow carcass - the colour, smell, and muscle tone - the kind lady who showed us round, led us to a warm room where we could remove our hair nets and overalls and take comfort in a bowl of vegetable soup.

BBC: Horsemeat scandal: Noble animal at centre of Romanian life

Pilot studies had shown that what might seem an obvious fourth procedure, to tone down, rather than enhance feather colour, was too damaging to work.

ECONOMIST: Male birds cannot afford to relax their standards

Freeze-frame, slow motion, colour filters and smoke give the film a distinctly undigital tone, viscous and personal, that focuses attention on the excellent performances of Kyra Sedgwick, Parker Posey and Fairuza Balk.

ECONOMIST: New talent, new techniques