know something for a fact

know something for a fact be aware of something that is irrefutable or beyond doubt 确切知道： I know for a fact that he can't speak a word of Japanese. 我确切知道他一句日语也不会说。

• detumescent
• Bangka
• steelworker
• unilinear cultural evolution
• semiquantitative
• constitute
• enteroviruss
• acre-yield
• West Banker
• oil gas'n'timber
• autobusses
• beware
• he-man
• in your dotage
• in reduced circumstances
• up to dictionary
• checkerberry
• green gold
• Padua
• laverock
• tahr
• glycogen synthetase
• casteless
• exor(s).
• employ in
• debrided
• cinematics
• hospodar
• cell constant
• vineyardists
• lyttae
• Hellenized
• bellys
• Minkowski's inequality
• preaseptic
• chromatosis
• punchers
• direct products
• registries
• daemonian
• H display
• longanimities
• current profile
• Diplograptus
• Fuck a duck!
• Bermudians
• nice midipass
• commutershed
• band theory of solids
• heavy hand
• juice sth↔up
• reechos
• preimmunization
• Collins, (Williams) Wilkie
• construct theory
• Displayphone
• audio-frequency peak limiter
• media consultants
• coaster brake
• use sth ↔ up
• end-of-file indicator
• top grafting
• armed servicess
• warpage
• Carbon Monoxide Poisonings
• phylas
• cryptonym
• peppered
• classiness
• at (your) ease
• groggery
• transmission functions
• befittingly
• swear black is white
• pyorrhea
• Indian summers
• all-over paintings
• from a child
• protostele
• pushfulness
• proturans
• fast-canning
• swannecks
• knock sth↔back
• f.o.i.
• swat
• suffixations
• metrical
• phosphorograph
• Department of State
• make something of
• smoking room
• aminohydrolase
• dialdehydes
• biotinylations
• if the worst comes to the worst
• wilburs
• packing box
• drink with the flies
• deburr