The sky is blue and the grass is green.
Meaning: This means that when you look up, you see a blue sky and when you look down, you see green grass.
Choice of Words: Sky is the area above the earth. Blue is a color. Grass is a type of plant that covers the ground. Green is a color. When you put them together, "the sky is blue and the grass is green" describes a common scene in nature.
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Related Expressions