A brougham and pair of grays, under the glare of a gas-lamp, stood before the doctor's door. 阿瑟·柯南·道尔.福尔摩斯归来记.
It was twenty minutes, and the reds had all faded into grays before Holmes and the trainer reappeared. 阿瑟·柯南·道尔.福尔摩斯回忆录.
These colors were bright, and were generally yellows, blues, and grays, although sometimes he used greens, violets, and browns. 鲁伯特·萨金特·荷兰.历史性发明.
For example, with alum and oxalic acid as a mordant and logwood as a dye, blue is obtained; but with a mordant of ferric sulphate and a dye of logwood, blacks and grays result. 伯莎M.克拉克.科学通论.