名词
中文翻译：卵石床
同义词：
['stone bed', 'pebble floor例句：1. The stone bed is covered with moss and lichen.（卵石床上覆盖着苔藓和地衣。）']
例句：
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1. The stone bed is covered with moss and lichen.
卵石床上覆盖着苔藓和地衣。
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2.The stone bed is a popular spot for birdwatching.
卵石床是观鸟的热门地点。
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3. The stone bed was made by the ancient people to store water.
卵石床是由古代人用来储存水的。