gray

白发；灰白的头发

Refers to hair that has lost its pigmentation, typically due to aging.

指通常因衰老而失去色素的头发。

灰色的天空

Describes the sky when it is completely covered with clouds, often indicating rain or gloomy weather.

描述天空完全被云层覆盖，通常预示着下雨或阴沉的天气。

灰色地带

A situation or subject that is not clearly defined and where there is no single right or wrong answer.

指一个没有明确定义、没有唯一正确或错误答案的情况或主题。

Describes an afternoon that is overcast, dull, and lacking in sunlight.