音标:[dai'hi:drәn] ;
n. [数]二面体
n. A figure with two sides or surfaces.

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Pronunciation is a funny thing. What pronunciation do you study? In England there are a hundred different accents but textbooks only teach one. What use is that? Actually, English teaching textbooks are pretty bad at teaching pronunciation. Look how

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学英语单词
active game
air of superiority
Alcarras
allopelagic
assertion data base
atomic era
bacteriolytic amboceptor
balanced reinforcement beam
be soft on
berthing compartment
black and white iceberg
chainings
coal unloader
coke quenching auxiliary
complementarily
corneal vertex
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dead center position
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design sheet
esoft
fetch front
fiducial marker
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fluazacort
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fuel filler
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galvanized corrugated steel
gate tension device
gettin' ass
gray-blue
heat embrittlement
help with
heterogenous cargo insurance
historic bay
hroger
independent system
indicating
ischiocavernous muscle
jiu (jiul)
Kaschgaria komarovii
kyopeulas crystal pulling technique
landed proprietor
left signal
lindernia rotundifolia
MCLU
midibus
minimum spread
modular flare/chaff dispenser
motor drill
mulberry-fed caterpillar
multiple integration method
necrosis of penis
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nonregioselective
of the most humble pretensions
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outlearn
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Phosphopyron
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readee
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region beyond the grave
ricinic
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ropiest
round head grooved bolt
semiopacity
semirevealing
Shagonar
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sodalitious
south pacific high
squeazy
stick-liker
subsurface crack
Sāmuwāla
tartareous
theobids
to arrest
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transverse dimension
trap line
V type engine
vacuum ladle
white-collar crimes
wrench torque
yasunori