名词
中文翻译：小石子
同义词：
['pebble', 'gravel', 'cobblestone例句：1. The river flowed over the smooth stones in its bed.（河水在河床上流过平滑的石头。）']
例句：
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1. The river flowed over the smooth stones in its bed.
河水在河床上流过平滑的石头。
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2.The trail was covered with small pebbles and cobblestones.
小石子和碎石铺满了小路。
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3. The rocks were scattered on the ground, making it difficult to walk.
岩石散落在地上，行走变得困难。