拼音：dò ng ch ōng ni ú hà n
解释：书放起来堆满了屋子，运走时累得牛出汗。后用以形容书极多。
单字解释： 栋 充 牛 汗
The books piled up in the room and were so tired that they were sweating when they were transported away. Later, it is used to describe many books.
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