a hard/tough nut to cracka difficult problem or situation 棘手的问题，难办的事 Celtic have lost only once this season and will be a tough nut to crack. 凯尔特人队本赛季只输过一场，不好对付。
a hard/tough nut to crack• West Ham will be a tough nut to crack especially with big Lee in good form at the moment.• Daytime television is a tough nut to crack. New shows have to be good enough to beat the old favorites.• Already highly successful in popular music, dance and commercial television, blacks have found the movies a tougher nut to crack.• Beverley was a tougher nut to crack.
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