mind one's Ps & Qs

mind one's Ps & Qs be careful to behave well and avoid giving offence 注意自己举止, 避免冒犯他人。 [ORIGIN: of unknown origin; said by some to refer to the care a young pupil must pay in differentiating the tailed letters p and q.]

• (at) first hand
• sound-board
• brisket
• polygala
• phonophores
• Newtonian flow
• nut-weevil
• mountain and valley winds
• leeward tide
• nyct-
• steelies
• liquid fluorine
• avion
• powderiest
• pachyderm
• double ax(e)
• uncertainty relation
• kid divorce
• fine chemicals
• soaks
• bell-type manometer
• make donation to
• enzygosity
• plen
• marsupians
• play the role of someone
• Herschel, Caroline Lacretia
• look through green glasses
• scrabbling
• active sleep
• rhinocerotidaes
• benzoic
• be hard/hot on sb’s/sth’s trail
• Anostraca
• tachistoscopic
• a/the bright spot
• stork parking
• leave in the lurch
• GCE
• lyard
• diminished arches
• braining
• ex hypothesi
• diethyls
• tail beam
• ordinary sharess
• differential chemical reactor
• reconstituent
• iktas
• nonwhite
• help sb↔out
• chaussure
• without fail
• genitalic
• locatings
• perfects
• a Mark Tapley
• tremie
• give someone a free hand
• an ounce of sense / truth / decency etc
• dry-flying
• humble yourself
• feel someone's pulse
• wait on sth/sb
• pelargonic alcohol
• reconversion
• at ... best
• spadices
• sclerotizes
• sand martins
• Yrly
• bradding
• lithium stearate
• corbel tables
• catalinas
• slide-way
• carry the can (for sb/sth)
• desoeuvrement
• gorillagram
• Delsarte system
• navy-blue
• lipoxidase
• strongbox
• anisotropies
• Kolbe, Hermann
• whole rests
• glossemic
• condemnor
• New Year's Days
• Kirchhoff's laws
• chicken out (of sth/of doing sth)
• unflappableness
• third bases
• bass staffs
• archcompetitors
• disjuncture
• hot pepper
• osteocranium
• blanking level
• Yale, Elihu