介词短语
中文翻译：在海滩上
同义词：
['at the beach', 'on the shore', 'by the seaside']
例句：
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1. Wedecided to go for a walk on the beach this weekend.
这个周末我们决定去海滩散步。
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2. She spent the day at the beach, enjoying the sun and sand.
她整天在海滩上，享受阳光和沙滩。
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3. The children were playing in the sand and building sandcastles on the beach.
孩子们在沙滩上玩耍，建造沙堡。