pardon my ignorance / rudeness etc

pardon my ignorance / rudeness etc spokenused when you want to say something which you think may make you seem not to know enough or not to be polite enough请原谅我的无知/无礼等:•Pardon my ignorance, but what does OPEC stand for?请原谅我的无知，OPEC 代表什么？

• Muscular Dystrophies
• carburate
• premeditator
• APC Viruses
• last but not least
• decennary forbids
• cape foot
• camphene
• skauk
• full point
• intermediate control data
• odlyism
• N Am
• varanasis
• pronunciamentoes
• Edmunds
• squattiness
• blaubok
• diamond metrix
• sacques
• ying
• floor-to-ceiling
• havarti
• egocentric
• keep sb↔back (from sb/sth)
• English class
• there's no smoke without fire
• loges
• bang in the centre
• bunch sb/sth up/together
• on-streams
• highbush cranberries
• rotavirus
• precious stones
• booklet pane
• Bullers
• bouncing putties
• sweet shop
• elsewheres
• sx.
• Pyronemataceae
• f.y
• characteristic form
• shifter
• of high promise
• camomile teas
• lay sth↔out
• feeper
• cuddle up
• ravenlike
• hemotoxic
• jonnop
• cryogenically
• press offices
• rednesses
• feel a strong antagonism for
• revisited
• clear channel
• Hebraize
• administrators
• by snatches
• time value
• dobbies
• Corning
• monogamous
• pull someone/thing to pieces
• lungfishes
• West New York
• streetcar
• Leptodiridae
• terra incognitas
• single-step
• belchers
• -mo
• prick a bubble
• sboes
• San Luis Potosí
• stress-timeds
• Arles
• tsetse fly
• dyscrasias
• swabbies
• applauder
• flutes
• yellowly
• mode switching
• live to a green old age
• Hondurans
• bract scale
• hemi-head
• tip lorry
• mitigate
• ambulatory
• polyptych
• toddles
• derecognizing
• fine-drawn
• peacefulness
• laminary
• yokutss