音标:['peritri:m] ;
孔缘
n. That part of the integument of an insect which surrounds
the spiracles.
n. The edge of the aperture of a univalve shell.

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学英语单词
A. N.
acetylsulfuric acid
acrosyndactyly
administrator in law
adoption of children act
air-entraining fibrous concrete
ammonia oxidation(process)
ant(a)efix(ae)
antirollover
application-oriented programming language
aquariist
argyll broadsword (scotland)
attachedly
bail act
batho-
Bayes machine
be strict about
bearship
bilge vortex
bills committee
bobbysock
bottini
bronxdale
C reactive protein
case drain line
company accounts
conaensis
cone dike
conical bellows
constructiveness
continuing loan agreement
conversion of unit
crank data
depressed basin
dihydrotachysterol
enicospilus shikokuensis
extra-fine fit
face sth. out
firenzuola
flicker fixer
flowering
for't
gerodontology
give-ways
Hensen's cells
herbert marxes
hereinbelow
horn of variation of flare angle
hypnoidal state
impeller diameter
incision and drainage of subphrenic abscess
Karaj Dam
keddle
kidwell
knife-edge gearing
legislative control
liquid fluidized bed reactor
liquidation committee of inspection
magnetic susceptibility
Mazanor
not worth the trouble to
NP185
palatopexy
paraffin burn
phygon
posterior vitelline vein
postmortem diagnosis
primary syphilis
program complexity
protandrous hermaphroditism
Public Security Ministry
pulmonary trunk
rause
resource of production
restoring to normal position
sarges
screw-thread cutting
selected axis title
sheet metal forming machines
silicon oxysulfide
sintered quartz
slabbing mill roll
sondesman
Spessart
start up price
statistical presentation
sterile board
stormworthy
stromatactis
stumpsucker
subscriber's inter-communication installation
subtrapezius
take-and-pay contract
taver
template eyepiece
the Black-Scholes model
thermolytic reactivity
Toluifera
vidana
Walnut Hill
yukked
zedek