名词
中文翻译：堆积
同义词：
['heap', 'stack', 'accumulation例句：1. The pile of books on the table is too heavy to lift.（桌子上那堆书太重了，搬不动。）']
例句：
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1. The pile of books on the table is too heavy to lift.
桌子上那堆书太重了，搬不动。
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2.The farmer has been piling up his crops for the winter.
农民一直在为冬天储存庄稼。
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3.The construction workers are piling rocks onto the hill.
建筑工人正在把石头堆在山上。