定义
(a) blue (sky): 蓝色（的天空）
- "Today I'm wearing a sky blue shirt, so I'll be using expressions related to the sky and the colour blue."
- "Here is Red Square, there is blue square, over there is black square."
- "to come out of the blue/out of a clear blue sky (this is my favourite today: sky AND blue!) - to come unexpectedly, as a total surprise"
- "Bruno : The two squares were covered by a dark blue circle."
- "And blue?"
- "The dark blue circle was in front of the squares, in the foreground."
- "- Blue collar with metallic novelty bone and name tag"
- "I also love blue shoes too!"
- "Eh... Blue?"
