shades

n.

暮色，夜色；荫( shade的名词复数 )；阴凉处；阴暗部分遮光物；

v.

遮蔽( shade的第三人称单数 )；险胜；加灯罩；画阴影于…之上

shades of gray n. 战栗迷情（美国电影）

1. Barrios, in his trademark shades and grin responded as expected.
   一旁的巴里奥斯戴着招牌式的墨镜，轻描淡写地笑了下。
2. He puts on his shades, pretends he is waiting for the bus or a friend, and sneaks up on people after the act.
   他会戴上墨镜，装作在等车或者等朋友，然后在违规发生后悄悄走到他们的背后。

Shades of Gray and Colour Constancy
Shades of black: Diversity in African-American identity.
Shades of Culture and Institutions in International Mergers
Shades of gray: the world of quantitative disease resistance.
Shades of joy: Patterns of appraisal differentiating pleasant emotions.
Shades of irreplaceability: towards a measure of the contribution of sites to a reservation goal
Shades of Silence: Emerging Themes and Future Directions for Research on Silence in Organizations
Nutritional quality of organic food: shades of grey or shades of green?
Lateral root development in Arabidopsis: fifty shades of auxin.
How to prevent varices from bleeding: shades of grey--the case for nonselective beta blockers