汗牛充栋的英文：
[Literal Meaning]
sweat/ox/fill/house
to have enough books to make the ox carrying them sweat or to fill a house to the rafters
[解释]
形容藏书非常多。
[Explanation]
an immense number of books
[例子]
他爸爸喜欢读书，家里有一万多本书，真是汗牛充栋了。
[Example]
His father enjoys reading and there are over 10,000 books in his apartment，which can fill the house to the rafters.
参考例句：
The crowning task would be to condense these voluminous still-accumulating materials
要完成任务，还得把汗牛充栋的，仍在不断增加的材料进行压缩。
