chalk and cheese

短语

天壤之别

发音

AU

释义与例句

n.
  1. 1.

    Said of things that are very different, though possibly superficially alike.

    天壤之别

    新西兰 习语 不可数

词源

Attested in variant form since 1393. The surface of some cheeses, particularly unaged ones, resembles the surface of chalk: white, crumbling, but in substance cheese is much softer than chalk. It is interesting to note that lime chalk and cottage cheese forms a glue-like material used in the restoration of ancient half-timbered houses, perhaps suggesting an alternative original meaning.

来源：wiktionary