sb / sth is not known to be sth

sb / sth is not known to be sth or sb / sth has never been known to do sth used to say there is no information that someone or something has particular qualities据说某人/某事物不是某种情况（不会做某事）:•This species is not known to be vicious.据说这一物种并不凶猛。

• robber baron
• trichotomy
• broad-leafed
• showmanly
• sovereign
• gravs
• Dubai
• capstan screws
• judicable
• drats
• dead cat
• misdemeanants
• prsmn
• unsuccessful
• nephrotic
• oestrogen
• indefinitenesses
• cool wool
• agrarian murder
• in steps
• London, City of
• retrofit
• Amentias
• get the last dance
• antiscriptural
• methicillins
• orbitary
• shift about
• talk at sb
• pseudo-static
• carnages
• carbon-14 datings
• ahmadiyyas
• tantalizes
• WAFS
• pedately
• tarnishproof
• anoestrus
• pull a sock into it
• clarifiers
• dappling
• breathe/infuse new life into
• constant-head meter
• turkey cocks
• enclaving
• Colpitts oscillator
• luminous energy
• goblet
• rabbeting
• hattiesburgs
• premonish
• seductiveness
• reckon with（或without）
• Celsius, Anders
• nuclear delivery vehicle
• King's highway
• machetes
• asphyxiator
• cy-cross
• disponged
• wide-spectrum
• as best (as)one can
• Rochon prism
• oil bath
• estoperpetua
• outsourcing
• kill
• wind chimes (或 bells)
• cartiers
• sounding line
• red giants
• drop weight
• symposiarch
• tidalite
• flame cleaning
• iraks
• have you heard the one about …
• on/upon sb’s heels
• azurmalachite
• pansified
• nitrators
• have no stomach for
• b-29s
• collectorships
• Nonning
• Saint Boniface
• reason sth ↔ out
• growthmen
• flashtube
• aeolian tones
• supposable
• Cypridacea
• have a feeling
• (stark) raving mad / bonkers
• sestina
• closing the books
• plough back
• inure from
• fitted或fit
• social engineering