名词
中文翻译：小石子
同义词：
['pebble', 'cobblestone例句：1. The riverbed is covered with smooth pebbles.（河床覆盖着光滑的卵石。）']
例句：
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1. The riverbed is covered with smooth pebbles.
河床覆盖着光滑的卵石。
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2.He carefully placed the large pebble on the ground.
他小心翼翼地把大卵石放在了地上。
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3.The old house was surrounded by a circle of smooth pebbles.
老房子周围是一圈光滑的卵石。