动词短语
中文翻译：堆叠
同义词：
['heap', 'stack', 'pile up例句：1. The children were happily playing with their toys in the park.（孩子们在公园里高兴地和他们的小玩具玩耍。）']
例句：
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1. The children were happily playing with their toys in the park.
孩子们在公园里高兴地和他们的小玩具玩耍。
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2.The snow was piling up on the roof of the house.
雪正积在房子的屋顶上。
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3. The food was piling up on the table.
食物正堆在桌子上。