gray

灰色, 暗淡

a neutral achromatic color midway between white and black; the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad; English radiobiologist in whose honor the gray (the SI unit of energy for the absorbed dose of radiation) was named (1905-1965); English poet best known for his elegy written in a country churchyard (1716-1771)

灰色的, 灰白的, 面色苍白的, 年老的, 老练的, 阴沉的

(使)变灰色