grey
灰色
gray?n.戈瑞；（Gray）人名：格雷；格瑞
pessimistic?adj.悲观的
gloomy?adj.黑暗的；光线不好的；感到悲伤（或悲观）的；使悲伤的
obscure?adj.未被发现的；未被查实的；无人知晓的；不确定的；模糊的；难懂的；费解的；晦涩难懂的；不出名的；昏暗的
ambiguous?adj.可作多种解释的；有歧义的；不确定的；不明朗的
例句
他对取消现行考试制度持灰色态度。
He is ambiguous about eliminating the present exam system.
一些人热衷写灰色的东西。
Some people make a point of writing about pessimistic themes.
窗帘被城市里的烟灰染成灰色了。
The curtains were grey with city smuts.
她回过头来用灰色的眼睛瞪着他。
Her grey eyes stared back at him.
立法中的一些灰色区域仍有待明确。
Grey areas in the legislation have still to be clarified.