scratch your head 同义词
1 冥思苦想
3 伤脑筋
4 绞尽脑汁
cudgel your brains scratch your head over rack your brains rack your brain beat your brains out
5 苦苦琢磨
uncertainties
uncomfortable
unbutton
uncap
uncomely
unceremonious
uncapped
uncompacted
uncoiling
uncivil
uncombed
unchancy
unchastity
uncaring
unchangeably
uncoated
unclamp
uncensored
uncleanly
unclassified
uncoil
unbundle
unchaste
unconstant
uncompanionable
uncomfortably
unclouded
unbuttoned
uncongealing
unclean