汗牛充栋 汗牛充棟
hàn niú chōng dòng
释义
lit. enough books to make a pack-ox sweat or to fill a house to the rafters (idiom); fig. many books
hàn niú chōng dòng
lit. enough books to make a pack-ox sweat or to fill a house to the rafters (idiom); fig. many books