under one’s hat

under one’s hat秘密地：The engineer designs his new machine under his hat，no one knows what machine it is.那工程师秘密地设计他的新机器，所以没有人知道那是什么机器。

• theoretical physics
• electronic differential analyzer
• counterweigh
• concupiscent
• fracture test
• polarises
• freaking
• big cats
• mourner
• electrochemical corrosion
• give someone a rap over the knuckles
• mine thrower
• Punic faith
• Gram, Hans Christian Joachim
• off-the-cuff
• transport number
• RNP
• diazine
• pitchest
• thumbpiece
• topological space
• starters
• inexpertly
• a priori
• Tachinidae
• wait for the dust to settle
• slabberers
• prestiges
• macaos
• monied
• vitriolisation
• anil
• give someone the go-by
• gallicas
• lineations
• gird up the loins
• snap your fingers
• hexaploid
• with a difference
• farrucas
• not as
• and so on（或forth）
• microanalytical
• anathematize,anathematizing
• astrologies
• Gobi
• wag it
• hylotheism
• bilge water
• downzoned
• spotted sea trout
• peremptorily
• photo-realisms
• Black, Hugo La Fayette
• pet project / theory / subject
• stellar light
• Limousin
• coupon system
• actual pressure
• scholzite
• skybolts
• go-go boot
• system effectiveness
• pimentos
• monotreme
• ill-gotten gains
• enthalpimetry
• course recorder
• levies
• minority briefcase
• polyester fibre
• Commonwealth of Independent States
• boiling
• phylaxis
• back pay
• squirrel rifle
• glomeruluss
• rip ... up
• a day off
• introgression
• lomentlike
• glee clubs
• precursors
• working top
• zeolites
• valetudinaries
• disentangles
• edutainments
• quinizarin
• lipid proteinosis
• hairwash
• restudied
• pissed as a newt
• Manassite
• bore premature
• hymenogastraless
• in the old way
• rip up
• distrustest
• in that galley