名词
中文翻译：小石子
同义词：
['gravel', 'pebble例句：1. The riverbed is covered with gravel.（河床覆盖着砾石。）']
例句：
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1. The riverbed is covered with gravel.
河床覆盖着砾石。
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2.She picked up a few pebbles from the beach.
她从海滩上捡了一些卵石。
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3.The path was lined with small stones.
小路两旁都是小石头。