音标:['ʌn'treisәbl] ;
a. 难追踪的, 难以发现的, 难以描绘的, 难以摹写的
a. incapable of being traced or tracked down

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学英语单词
Abies fanjingshanensis
ability to design plans and strategies
adverb clause
agricultural chemical occupations
air-cooled steel
alberty
allantoic vessel
amah
analytical balance weight
Aphananthe
ariyama
berrettas
bisney
blistering agent
chemical adsorption
child domain
chord-repetition
combinational
computer company
congestion call meter
continuity plan
coset nordstrom-robinson code
court jesters
crab claw
cuts it out
Daniell Peninsula
dbs
deka-meter
dexify
druggery
electromagnetic coupling
electrophysical
first line supervisor
five level code
Gepatschhaus
glazed cornice
graphoid
half sideward lunge standing
have the wolf by the ear
high ascii
highly branched compound
internal distraction
Internet Group Management Protocol
isoseist
joyn
land use map
Legio
lower deck
methosulphates
microphysiologies
microprogram architecture
minimum price&import prohibition
moisture adiabatic lapse rate
moonlikest
musico-
notice of refusal to pay
off line operation
on good terms with
optimal path in graph
orbignyas
peptizator
plasticians
polar solid angle
pressure-control relay
productive force
putti
Rami celiaci
release sign
relief duty
revised-lower-bound
ribitylfiavin
rotating speed
Rubus chamaemorus
segment acknowledgement
sense of pain
shaft straightener
singlepipe system
SIP phone
Slaidburn
spray weather
stylopharyngei
subminiatures
suspended particles
Symplocos wenshanensis
Szrensk
Sīyunī
taibbi
the end is nigh
the ides of march
tigerous
to demonstration
transshipment
triphanes
umoa
Vaughan's typhoid residue
welding performance
wettability effect
wrap someone in cotton wool
wroxeter
zeeman nuclear quadrupole resonance
zeta-distribution