scratch one's head

scratch one's head informal think hard in order to find a solution to something 〈非正式〉冥思苦想问题的解答。 ■ feel or express bewilderment 感到（或表示）困惑。

• artificial element
• bit manipulation
• coromandels
• mixed up in
• wax tree
• innate
• donkeywork
• animalise
• basic education
• tread the deck
• deistically
• beadsman
• march to (the beat of) a different drummer/drum
• actual code
• neutrally
• nephralgias
• cannon fodder
• dissimilar from
• sapients
• backshop
• roughen
• urbicidal
• on shanks’s mare
• chrysolites
• ellipse
• friction bearing
• beat up recruits
• self-serve
• ballotting
• primogenitureship
• fatheads
• haptens
• soapolallie
• hypoderm
• bustle off
• positing
• notes inegales
• silver bass
• petaled或petalled
• Bateson, William
• licorice
• Nippon
• protesting
• be endowed with sth
• leave someone in someone's care
• fine-drawer
• Compositae
• time-servingness
• geographical plot
• hard wall
• Eulerian trail
• character part
• pectorally
• Dee
• mooring line
• wince at
• boatmanship
• shaped-chamber manometer
• imagist
• deglutitions
• footrest
• outside forward
• shut down
• fanaticizing
• Harvey
• sight glasses
• sexangular
• in（或into）the groove
• rearrangings
• tax stop
• low-rent home
• breathing space
• culdoscopes
• sweet omelette
• astrolatries
• tiers etat
• bayonet charge
• get around
• the little go
• Marielito
• alloplastics
• to someone's appetite
• quinolines
• Schutzstaffel
• dare someone to do something
• assertional
• monseigneurs
• longitudinal wave
• Torah
• suggestively
• wherewithal
• hoarsen
• diaminozide
• monoskiing
• hawkishness
• choral society
• subordering
• hymnbook
• unknown to
• curtnesses