Balls bounced high in the summer sky.
Meaning: The children were playing with balls that were bouncing high in the air.
Choice of Words: Balls are round objects that are used for playing games. Bounced is the past tense of the verb bounce, which means to spring back after hitting a surface. High means at a great distance from the ground. Summer is the warmest season of the year. Sky is the upper limit of the atmosphere.
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Related Expressions