Chinese

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perspiration; sweat ox; cow; bull
fill; satisfy; fulfil
fill; satisfy; fulfil; to act in place of; substitute; sufficient; full
 
roof beam
trad. (汗牛充棟)
simp. (汗牛充栋)
Literally: “(enough books) to make a pack-ox sweat or to fill a house to the rafters”.

Pronunciation

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Idiom

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汗牛充棟

  1. (figurative, of books) to be numerous