have a card up your sleeve

have a card up your ˈsleeveto have an idea, a plan, etc. that will give you an advantage in a particular situation and that you keep secret until it is needed有锦囊妙计；留有一招

• valuable
• pressure contact
• embezzlements
• pep pill
• merchandizers
• inside diameter
• passive metal
• in the mill
• secondary minerals
• behalfs
• waynes
• owl parrots
• damselflies
• Foochow
• swing-around trajectory
• affiliation proceedings
• Lily
• gn
• cationic
• shellac
• anti-armor cluster munitions
• Bohr-van Leeuwen theorem
• creatine kinase
• Jubbulpore
• magnetic storage
• tortoiseshells
• square-dances
• Jacobinisms
• satrunineness
• decreased
• h.o.l.l.a.n.d
• barbascos
• bottomries
• stoicheiometric
• biosynthetics
• breast-feds
• cool jazz
• pre-feminist
• optic vesicle
• big noises
• Construction Loans
• redeployments
• scoopers
• upstairs
• bestow on
• shtetels
• Teleplayer
• overemphasise
• difffusibleness
• be none the worse (for sth)
• Greek
• hydraulic losses
• hyalospongiaes
• rent-a-cars
• deinonychuses
• white cedars
• enrollees
• substitution
• corporate spying
• sleeping draught
• racing skate
• valproate
• septemvirs
• impassabilities
• let things rip
• Lando
• glamour girl / boy
• magnesium arsenate
• morcilla
• litter about
• delayed alpha particles
• clearance
• correl.
• menstrual cycles
• half past one （two等）
• monopolist
• line-print
• cut/hurt sb to the quick
• Pleasants' Fog Kill
• horsebreaker
• Graecises
• roll a window up
• stock-cars
• mucronation
• rjs
• normal pitch
• Hemimetabola
• come to one's hand
• Voltaire
• sepso-
• sweptback wing
• abominators
• species-poor
• have eyes bigger than the stomach
• blastomylonite
• frontcourt
• tropaeolin
• disputes
• soften / cushion the blow
• MeV