a hard/tough nut (to crack)

a hard/tough ˈnut (to ˈcrack)a difficult problem or situation to deal with棘手的问题；不好对付的情形

• fraenums
• not that
• irretrievable
• cardioid condenser
• batfowler
• double-spaceds
• backflow preventer
• optimize
• perfectivity
• recharges
• Makuas
• hypersensitizer
• shinbones
• the sword of justice
• squattage
• beach grasses
• catalyst stripping
• wer
• euphemisation
• videolog
• Smokey Bear
• lorisid
• photogene
• guanay
• saturation dive
• verditers
• Lemuralia
• centralisms
• wiseasses
• executive flu
• compression release
• goy
• bilophodont
• Yorkshire pudding
• polycondensation
• knowledge
• Cyttariales
• encephalomyelopathy
• Savoie
• antimony iodide
• powdery scab
• serous cystadenoma
• Jolly Roger
• overconfidences
• dosshouse
• steam-roller methods(或 tactics)
• Lamna
• YHA
• coloratura
• heavy date
• gutturalize
• advanced information service
• kneepads
• non-Hodgkin's lymphoma
• put a stay upon
• insightfully
• kame terrace
• kapur
• rifflemen
• pass sth↔around/round
• Lacandom
• retrooperative
• Hamilton
• T.T.B. rate
• dree
• supvr
• mermaid
• lookism
• Beroida
• Bream, Julian
• nitroethane
• phosphatic nodule
• pensionable pay / salary etc
• wiretaps
• neo-Pentecostalism
• grave damage to one's reputation
• electrochemical gradient
• in your heart (of hearts)
• ascending colon
• hold one's cards close to the chest
• Adansonian taxonomy
• speechreader
• tailors
• tea tree
• ISD
• campiness
• channel-lag deposit
• unsewed或-sewn
• scorepad
• parity transformation
• get it in for someone
• pour out grievances
• gather sb to you / gather sb up
• material
• news story
• Global One
• Anglo-Saxondom
• never-outs
• denial
• no go